Dunhuang is situated in a oasis containing Crescent Lake and Mingsha Shan (鸣沙山, meaning "Singing-Sand Mountain"), named after the sound of the wind whipping off the dunes, the singing sand phenomenon. Dunhuang commands a strategic position at the crossroads of the ancient Southern Silk Route and the main road leading from India via Lhasa to Mongolia and Southern Siberia,[1] as well as controlling the entrance to the narrow Hexi Corridor, which led straight to the heart of the north Chinese plains and the ancient capitals of Chang'an (today known as Xi'an) and Luoyang.[3]

There is evidence of habitation in the area as early as 2,000 BC, possibly by people recorded as the Qiang in Chinese history. Its name was also mentioned in relation to the homeland of the Yuezhi in the Records of the Grand Historian. Some have argued that this may refer to the unrelated toponymDunhong – the archaeologist Lin Meicun has also suggested that Dunhuan may be a Chinese name for the Tukhara, a people widely believed to be a Central Asian offshoot of the Yuezhi.[4]

Dunhuang was one of the four frontier garrison towns (along with Jiuquan, Zhangye and Wuwei) established by the Emperor Wu after the defeat of the Xiongnu, and the Chinese built fortifications at Dunhuang and sent settlers there. The name Dunhuang, meaning "Blazing Beacon", refers to the beacons lit to warn of attacks by marauding nomadic tribes. Dunhuang Commandery was probably established shortly after 104 BC.[5] Located in the western end of the Hexi Corridor near the historic junction of the Northern and Southern Silk Roads, Dunhuang was a town of military importance.[6]

"The Great Wall was extended to Dunhuang, and a line of fortified beacon towers stretched westwards into the desert. By the second century AD Dunhuang had a population of more than 76,000 and was a key supply base for caravans that passed through the city: those setting out for the arduous trek across the desert loaded up with water and food supplies, and others arriving from the west gratefully looked upon the mirage-like sight of Dunhuang's walls, which signified safety and comfort. Dunhuang prospered on the heavy flow of traffic. The first Buddhist caves in the Dunhuang area were hewn in 353."[7]

During the Sui (581-618) and Tang (618-907) dynasties, it was the main stop of communication between ancient China and the rest of the world and a major hub of commerce of the Silk Road. Dunhuang was the intersection city of all three main silk routes(north, central, south) during this time.

From the West also came early Buddhist monks who had arrived in China by the first century AD, and a sizable Buddhist community eventually developed in Dunhuang. The caves carved out by the monks, originally used for meditation, developed into a place of worship and pilgrimage called the Mogao Caves or "Caves of a Thousand Buddhas."[8] A number of Christian, Jewish, and Manichaean artifacts have also been found in the caves (see for example Jesus Sutras), testimony to the wide variety of people who made their way along the Silk Road.

As a frontier town, Dunhuang was fought over and occupied at various times by non-Han people. After the fall of Han Dynasty it came under the rule of various nomadic tribes, such as the Xiongnu during Northern Liang and the Turkic Tuoba during Northern Wei. The Tibetans occupied Dunhuang when the Tang empire became weakened considerably after the An Lushan Rebellion; and even though it was later returned to Tang rule, it was under quasi-autonomous rule by the local general Zhang Yichao who expelled the Tibetans in 848. After the fall of Tang, Zhang's family formed the Kingdom of Golden Mountain in 910,[9] but in 911 it came under the influence of the Uighurs. The Zhangs were succeeded by the Cao family who formed alliances with the Uighurs and the Kingdom of Khotan. During the Song Dynasty, Dunhuang fell outside the Chinese borders. In 1036 the Tanguts who founded the Xi Xia Dynasty captured Dunhuang.[9] From the reconquest of 848 to about 1036 (i.e. era of the Guiyi Circuit), Dunhuang was a multicultural entrepot that contained one of the largest ethnic Sogdian communities in China following the An Lushan Rebellion. The Sogdians were Sinified to some extent and were bilingual in Chinese and Sogdian. Their documents in Chinese characters were written horizontally from left to right, the same way the Sogdian alphabet is read, instead of vertical line (or right to left if horizontal) that Chinese was normally written at the time.[10]

Dunhuang was conquered in 1227 by the Mongols who sacked and destroyed the town, and the rebuilt town became part of the Mongol Empire in the wake of Kublai Khan' s conquest of China under the Yuan Dynasty. Dunhuang went into a steep decline after the Chinese trade with the outside world became dominated by Southern sea-routes, and the Silk Road was officially abandoned during the Ming Dynasty. It was occupied again by the Tibetans c. 1516, and also came under the influence of the Chagatai Khanate in the early sixteenth century.[11] It was retaken by China two centuries later c. 1715 during the Qing Dynasty, and the present-day city of Dunhuang was established east of the ruined old city in 1725.[12]

Dunhuang classical dance

Today, the site is an important tourist attraction and the subject of an ongoing archaeological project. A large number of manuscripts and artifacts retrieved at Dunhuang have been digitized and made publicly available via the International Dunhuang Project.[13] The expansion of the Kumtag Desert, which is resulting from long-standing overgrazing of surrounding lands, has reached the edges of the city.[14]

In 2011 satellite images showing huge structures in the desert near Dunhuang surfaced online and caused a brief media stir.[15]

A number of Buddhist cave sites are located in the Dunhuang area, the most important of these is the Mogao Caves which is located 25 km (16 mi) southeast of Dunhuang. There are 735 caves in Mogao, and the caves in Mogao are particularly noted for their Buddhist art,[16] as well as the hoard of manuscripts, the Dunhuang manuscripts, found hidden in a sealed-up cave. Many of these caves were covered with murals and contain many Buddhist statues. Discoveries continue to be found in the caves, including excerpts from a Christian Bible dating to the Yuan Dynasty.[17]

These rammed earth ruins of a granary in Hecang Fortress (Chinese: 河仓城； Pinyin: Hécāngchéng), located ~11 km (7 miles) northeast of the Western-Han-era Yumen Pass, were built during the Western Han (202 BC - 9 AD) and significantly rebuilt during the Western Jin (280-316 AD).[18]

Dunhuang Night Market is a night market held on the main thoroughfare, Dong Dajie, in the city centre of Dunhuang, popular with tourists during the summer months. Many souvenir items are sold, including such typical items as jade, jewelry, scrolls, hangings, small sculptures, leather shows puppets, coins, Tibetan horns and Buddha statues.[19] A sizable number of members of China's ethnic minorities engage in business at these markets. A Central Asian dessert or sweet is also sold, consisting of a large, sweet confection made with nuts and dried fruit, sliced into the portion desired by the customer.

Dunhuang has a cold desert climate (KöppenBWk), with an annual total precipitation of 67 millimetres (2.64 in), the majority of which occurs in summer; precipitation occurs only in trace amounts and quickly evaporates.[20] Winters are long and cold, with a 24-hour average temperature of −8.3 °C (17.1 °F) in January, while summers are hot, with a July average of 24.6 °C (76.3 °F); the annual mean is 9.48 °C (49.1 °F). The diurnal temperature variation averages 16.1 °C (29.0 °F) annually. With monthly percent possible sunshine ranging from 69% in March to 82% in October, the city receives 3,258 hours of bright sunshine annually, making it one of the sunniest nationwide.

Beal, Samuel. 1911. The Life of Hiuen-Tsiang by the Shaman Hwui Li, with an Introduction containing an account of the Works of I-Tsing. Trans. by Samuel Beal. London. 1911. Reprint: Munshiram Manoharlal, New Delhi. 1973.

Hill, John E. 2004. The Peoples of the West from the Weilue 魏略 by Yu Huan 魚豢: A Third Century Chinese Account Composed between 239 and 265 CE. Draft annotated English translation. [1]

Hulsewé, A. F. P. and Loewe, M. A. N. 1979. China in Central Asia: The Early Stage 125 BC – AD 23: an annotated translation of chapters 61 and 96 of the History of the Former Han Dynasty. E. J. Brill, Leiden.

Legge, James. Trans. and ed. 1886. A Record of Buddhistic Kingdoms: being an account by the Chinese monk Fâ-hsien of his travels in India and Ceylon (AD 399-414) in search of the Buddhist Books of Discipline. Reprint: Dover Publications, New York. 1965.

Lok, Wai-ying. (2012). The significance of Dunhuang iconography from the perspective of Buddhist philosophy: a study mainly based on Cave 45 (PDF) (PhD Dissertation). The University of Hong Kong.

1.
County-level city
–
A county-level municipality, county-level city, or county city is a county-level administrative division of mainland China. County-level cities are governed by prefecture-level divisions, but a few are governed directly by province-level divisions. Most county-level cities were created in the 1980s and 1990s by replacing counties, a county-level city is a city and county that have been merged into one unified jurisdiction. As such it is simultaneously a city, which is an entity. County-level cities are not cities in the strictest sense of the word, since they usually contain rural areas many times the size of their urban and this is because the counties that county-level cities have replaced are themselves large administrative units containing towns, villages, and farmland. To distinguish a city from its actual urban area, the term 市区 shìqū. In France, an equivalent of a city is an agglomeration community. For example, in New South Wales such a unit may often be called a city, city of Blue Mountains is made of a number of towns. Another example would be municipal government in the Canadian province of Ontario and this agglomeration includes all of the townships in the county of Kent, with cities and towns like Wallaceberg, Thamesville, Dresden, Wheatley. This amalgamation as it is referred to, was controversial when it was forced upon the constituents through provincial legislation. Today, instead of each city having its own mayor and city councillors, as of January 2017, there are 360 County-level city in total, A sub-prefecture-level city is a county-level city with powers approaching those of prefecture-level cities. Examples include, Xiantao, Qianjiang, Tianmen and Jiyuan, administrative divisions of China Counties of the Peoples Republic of China Prefecture-level city List of cities in China

2.
Geographic coordinate system
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A geographic coordinate system is a coordinate system used in geography that enables every location on Earth to be specified by a set of numbers, letters or symbols. The coordinates are chosen such that one of the numbers represents a vertical position. A common choice of coordinates is latitude, longitude and elevation, to specify a location on a two-dimensional map requires a map projection. The invention of a coordinate system is generally credited to Eratosthenes of Cyrene. Ptolemy credited him with the adoption of longitude and latitude. Ptolemys 2nd-century Geography used the prime meridian but measured latitude from the equator instead. Mathematical cartography resumed in Europe following Maximus Planudes recovery of Ptolemys text a little before 1300, in 1884, the United States hosted the International Meridian Conference, attended by representatives from twenty-five nations. Twenty-two of them agreed to adopt the longitude of the Royal Observatory in Greenwich, the Dominican Republic voted against the motion, while France and Brazil abstained. France adopted Greenwich Mean Time in place of local determinations by the Paris Observatory in 1911, the latitude of a point on Earths surface is the angle between the equatorial plane and the straight line that passes through that point and through the center of the Earth. Lines joining points of the same latitude trace circles on the surface of Earth called parallels, as they are parallel to the equator, the north pole is 90° N, the south pole is 90° S. The 0° parallel of latitude is designated the equator, the plane of all geographic coordinate systems. The equator divides the globe into Northern and Southern Hemispheres, the longitude of a point on Earths surface is the angle east or west of a reference meridian to another meridian that passes through that point. All meridians are halves of great ellipses, which converge at the north and south poles, the prime meridian determines the proper Eastern and Western Hemispheres, although maps often divide these hemispheres further west in order to keep the Old World on a single side. The antipodal meridian of Greenwich is both 180°W and 180°E, the combination of these two components specifies the position of any location on the surface of Earth, without consideration of altitude or depth. The grid formed by lines of latitude and longitude is known as a graticule, the origin/zero point of this system is located in the Gulf of Guinea about 625 km south of Tema, Ghana. To completely specify a location of a feature on, in, or above Earth. Earth is not a sphere, but a shape approximating a biaxial ellipsoid. It is nearly spherical, but has an equatorial bulge making the radius at the equator about 0. 3% larger than the radius measured through the poles, the shorter axis approximately coincides with the axis of rotation

3.
China
–
China, officially the Peoples Republic of China, is a unitary sovereign state in East Asia and the worlds most populous country, with a population of over 1.381 billion. The state is governed by the Communist Party of China and its capital is Beijing, the countrys major urban areas include Shanghai, Guangzhou, Beijing, Chongqing, Shenzhen, Tianjin and Hong Kong. China is a power and a major regional power within Asia. Chinas landscape is vast and diverse, ranging from forest steppes, the Himalaya, Karakoram, Pamir and Tian Shan mountain ranges separate China from much of South and Central Asia. The Yangtze and Yellow Rivers, the third and sixth longest in the world, respectively, Chinas coastline along the Pacific Ocean is 14,500 kilometers long and is bounded by the Bohai, Yellow, East China and South China seas. China emerged as one of the worlds earliest civilizations in the basin of the Yellow River in the North China Plain. For millennia, Chinas political system was based on hereditary monarchies known as dynasties, in 1912, the Republic of China replaced the last dynasty and ruled the Chinese mainland until 1949, when it was defeated by the communist Peoples Liberation Army in the Chinese Civil War. The Communist Party established the Peoples Republic of China in Beijing on 1 October 1949, both the ROC and PRC continue to claim to be the legitimate government of all China, though the latter has more recognition in the world and controls more territory. China had the largest economy in the world for much of the last two years, during which it has seen cycles of prosperity and decline. Since the introduction of reforms in 1978, China has become one of the worlds fastest-growing major economies. As of 2016, it is the worlds second-largest economy by nominal GDP, China is also the worlds largest exporter and second-largest importer of goods. China is a nuclear weapons state and has the worlds largest standing army. The PRC is a member of the United Nations, as it replaced the ROC as a permanent member of the U. N. Security Council in 1971. China is also a member of numerous formal and informal multilateral organizations, including the WTO, APEC, BRICS, the Shanghai Cooperation Organization, the BCIM, the English name China is first attested in Richard Edens 1555 translation of the 1516 journal of the Portuguese explorer Duarte Barbosa. The demonym, that is, the name for the people, Portuguese China is thought to derive from Persian Chīn, and perhaps ultimately from Sanskrit Cīna. Cīna was first used in early Hindu scripture, including the Mahābhārata, there are, however, other suggestions for the derivation of China. The official name of the state is the Peoples Republic of China. The shorter form is China Zhōngguó, from zhōng and guó and it was then applied to the area around Luoyi during the Eastern Zhou and then to Chinas Central Plain before being used as an occasional synonym for the state under the Qing

4.
Province (China)
–
Provinces, formally provincial-level administrative divisions or first-level administrative divisions, are the highest-level Chinese administrative divisions. There are 34 such divisions, classified as 23 provinces, four municipalities, five autonomous regions, the Peoples Republic of China claims sovereignty over the territory administered by the Republic of China, claiming most of it as its Taiwan Province. The ROC also administers some offshore islands which form Fujian Province and these were part of an originally unified Fujian province, which since the stalemate of the Chinese Civil War in 1949 has been divided between the PRC and ROC. Note that every province has a Communist Party of China provincial committee, the committee secretary is in effective charge of the province, rather than the nominal governor of the provincial government. The government of each province is nominally led by a provincial committee. The committee secretary is first-in-charge of the province, second-in-command is the governor of the provincial government, the Peoples Republic of China claims the island of Taiwan and its surrounding islets, including Penghu, as Taiwan Province. The territory is controlled by the Republic of China, a municipality or direct-controlled municipality is a higher level of city which is directly under the Chinese government, with status equal to that of the provinces. In practice, their status is higher than that of common provinces. The governor of each region is usually appointed from the respective minority ethnic group. A special administrative region is an autonomous and self-governing subnational subject of the Peoples Republic of China that is directly under the Central Peoples Government. Each SAR has an executive as head of the region. The regions government is not fully independent, as policy and military defence are the responsibility of the central government. Notes,1, as of 20102, per km23, km24, Abbreviation in the parentheses is informal 5, Since founding in 1949, however, the PRC has never controlled Taiwan. Taiwan currently administers Taiwan, Penghu, Kinmen and Matsu, the subject of whether or not Taiwan is part of China is often debated, with no clear conclusion. The Ming Dynasty kept the system set up by the Yuan Dynasty, however. By the time of the establishment of the Qing Dynasty in 1644 there were 18 provinces, in addition, there was a zongdu, a general military inspector or governor general, for every two to three provinces. Outer regions of China were not divided into provinces, military leaders or generals oversaw Manchuria, Xinjiang, and Mongolia, while vice-dutong and civilian leaders headed the leagues, a subdivision of Mongolia. The ambans supervised the administration of Tibet, in 1884 Xinjiang became a province, in 1907 Fengtian, Jilin, and Heilongjiang were made provinces as well

5.
Gansu
–
Gansu is a province of the Peoples Republic of China, located in the northwest of the country. It lies between the Tibetan and Loess plateaus, and borders Mongolia, Inner Mongolia, and Ningxia to the north, Xinjiang and Qinghai to the west, Sichuan to the south, the Yellow River passes through the southern part of the province. Gansu has a population of 26 million and covers an area of 425,800 square kilometres, the capital is Lanzhou, located in the southeast part of the province. Gansu is a compound of the names of Ganzhou and Suzhou, Gansu is abbreviated as 甘 or 陇, and is also known as Longxi or Longyou, in reference to the Long Mountain east of Gansu. Gansu is a name first used during the Song dynasty of two Sui and Tang dynasty prefectures, Gan and Su. In prehistoric times, Gansu was host to Neolithic cultures, the Dadiwan culture, from where archaeologically significant artifacts have been excavated, flourished in the eastern end of Gansu from about 6000 BC to about 3000 BC. The Majiayao culture and part of the Qijia culture took root in Gansu from 3100 BC to 2700 BC and 2400 BC to 1900 BC respectively, the Yuezhi originally lived in the very western part of Gansu until they were forced to emigrate by the Xiongnu around 177 BCE. The State of Qin, later to become the state of the Chinese empire, grew out from the southeastern part of Gansu. The Qin name is believed to have originated, in part, Qin tombs and artifacts have been excavated from Fangmatan near Tianshui, including one 2200-year-old map of Guixian County. In imperial times, Gansu was an important strategic outpost and communications link for the Chinese empire, the Han dynasty extended the Great Wall across this corridor, building the strategic Yumenguan and Yangguan fort towns along it. Remains of the wall and the towns can be found there, the Ming dynasty built the Jiayuguan outpost in Gansu. By the Qingshui treaty, concluded in 823 between the Tibetan Empire and the Tang dynasty, China lost a part of Gansu province for a significant period. After the fall of the Uyghur Empire, an Uyghur state was established in parts of Gansu that lasted from 848 to 1036 AD, during that time, many of Gansus residents were converted to Islam. Along the Silk Road, Gansu was an important province. Temples and Buddhist grottoes such as those at Mogao Caves and Maijishan Caves contain artistically and historically revealing murals. An early form of paper inscribed with Chinese characters and dating to about 8 BC was discovered at the site of a Western Han garrison near the Yumen pass in August 2006, the province was also the origin of the Dungan Revolt of 1862-77. Among the Qing forces were Muslim generals like Ma Zhanao and Ma Anliang who helped Qing crush the rebel Muslims, the revolt spread into Gansu from neighbouring Qinghai. Frequent earthquakes, droughts and famines have tended to slow progress of the province until recently

6.
Prefecture-level city
–
Prefectural level cities form the second level of the administrative structure. Administrative chiefs of prefectural level cities generally have the rank as a division chief of a national ministry. Since the 1980s, most former prefectures have been renamed into prefectural level cities, a prefectural level city is a city and prefecture that have been merged into one unified jurisdiction. The larger prefectural level cities span over 100 kilometres, prefectural level cities nearly always contain multiple counties, county level cities, and other such sub-divisions. To distinguish a prefectural level city from its urban area. The first prefectural level cities were created on 5 November 1983, over the following two decades, prefectural level cities have come to replace the vast majority of Chinese prefectures, the process is still ongoing. Most provinces are composed entirely or nearly entirely of prefectural level cities, shijiazhuang and Zhengzhou are the largest prefectural level cities with populations approaching or exceeding some sub-provincial cities. A sub-prefecture-level city is a city with powers approaching those of prefectural level cities. There are total of three classification of prefecture-level city, Regular prefectural level city which consist of counties, county level cities, consolidated district-governed prefectural level city which only consist of districts as it subdivisions. Thus, Bloomington, Indiana is indicated on the map by a point, which is distinct from, and enclosed by, in China, however, large cities such as City of Xianning may, in reality, contain both urban and rural elements. Moreover, they may enclose counties or other cities, on a less detailed map, City of Xianning would be indicated by a point, more or less corresponding to the coordinates of its city government. Other populous areas may also be exhibited as points, such as County of Tongshan, with no indication that County of Tongshan is, in fact, enclosed by City of Xianning. On a more detailed map, City of Xianning would be drawn as an area, similar to a county of the United States and this convention may lead to difficulty in the identification of places mentioned in older sources. For example, Guo Moruo writes that he was born in Town of Shawan, within Prefecture of Leshan, and attended primary school in Town of Jiading. A modern map is unlikely to show either town, Shawan, because it is too small, and Jiading, because it is the seat of City of Leshan, and is therefore indicated on the map by a point labelled Leshan. A more detailed map would show Shawan as a district within City of Leshan, statistics of China such as population and industrial activity are generally reported along prefectural city lines. Thus, the relatively unknown City of Huangshi has 2.5 million residents, more than most European capitals, but upon closer inspection, furthermore, Huangshi contains several other cities, such as City of Daye. If a person wished to calculate the population of the area of Huangshi, and had a map of Huangshi, and a table of its population by district

7.
Jiuquan
–
Jiuquan, formerly known as Suzhou, is a prefecture-level city in the northwesternmost part of Gansu Province in the Peoples Republic of China. It is more than 600 km wide from east to west, occupying 191,342 km2 and its population was 962,000 in 2002. The city was known as Fulu, which became known as Suzhou after it became the seat of Su Prefecture under the Sui. As the seat of Jiuquan Commandery, it became known by that name in turn. Fulu was founded in 111 BC as an outpost in the Hexi Corridor near the Jade Gate along the overland Silk Road, Jiuquan was a Han prefecture and, under the Eastern Han, an active military garrison. Su Prefecture was established under the Sui and renamed Jiuquan Commandery under the Tang and it sometimes served as the capital of the province of Gansu. Along with its role protecting trade along the Silk Road, Suzhou was the center of the rhubarb trade. Meng Qiaofang took it from Ding Guodong in 1649, the Hui under Ma Wenlu held it during the Dungan Revolt. It was completely destroyed by the time it was recovered by the Qing general Zuo Zongtang in 1873, winchester reported that, in 2008, a large billboard at the entrance to the city read Without Haste, Without Fear, We Conquer the World. Jiuquan occupies the westernmost part of Gansu, bordering Zhangye City to the east, Qinghai to the south, Xinjiang to the west, Ejin Banner of Inner Mongolia and Mongolia to the north. Its administrative area ranges in latitude from 37°58 to 42°48 N and in longitude from 92°09 to 100°20 E, Suzhou District is approximately 1,500 meters above sea level. Jiuquan has a desert climate, with long, cold winters. Monthly average temperatures range from −9.0 °C in January to 21.7 °C in July, the diurnal temperature variation is relatively large, averaging 13.8 °C annually. With sunny weather and low humidity dominating year-round, the hosts one of the launch sites for the PRCs space programme. With monthly percent possible sunshine ranging from 62% in July to 77% in October, Jiuquan is served by China National Highway 312 and the Lanzhou-Xinjiang Railway. The Lanxin Railway has several branches within Jiuquan Prefecture. In particular, a branch runs from the Liugou Station in Guazhou County to Dunhuang, serving both Guazhou county seat and Dunhuang. There are plans to expand it further south into Qinghai, the extension, known as the Golmud–Dunhuang Railway, there is also the Jiayuguan–Ceke branch, which runs through the desert areas of Jiuquan Prefectures Jinta County

8.
China standard time
–
The time in China follows a single standard time offset of UTC+08,00, despite China spanning five geographical time zones. The official national standard time is called Beijing Time domestically and China Standard Time internationally, daylight saving time has not been observed since 1991. The special administrative regions maintain their own authorities, with standards called Hong Kong Time. These have been equivalent to Beijing time since 1992, in addition, a second time standard is used in Xinjiang, two hours less than the Beijing Time, which is called Ürümqi Time or Xinjiang Time. In 1912, the Republic of China established five standard time zones, namely Kunlun, Sinkiang-Tibet, Kansu-Szechwan, Chungyuan, and Changpai. The unified time zone policy was adopted by the Communist Party of China or the Central People’s Government some time between 27 September 1949 and 6 October 1949, the date is unknown. However, recent research suggests that the policy was most likely adopted on 27 September 1949, daylight saving time was observed from 1986 to 1991. In 1997 and 1999, Hong Kong and Macau were transferred to China from the United Kingdom and Portugal, although the sovereignty of the SARs belongs to China, they retain their own policies regarding time zones for historical reasons. Due to their locations, both are within the UTC+08,00 time zone, which is the same as the national standard — Beijing time. Xinjiang Time, also known as Ürümqi Time, is set due to its location in the westernmost part of the country. The time offset is UTC+06,00, which is two hours behind Beijing, and is shared with neighbouring Kazakhstan and Kyrgyzstan. Currently, timezone usage within Xinjiang is roughly split along the divide, with most ethnic Han following Beijing time. Some local authorities are now using both time standard side by side, the coexistence of two timezones within the same region causes some confusion among the local population, especially when inter-racial communication occur. Some ethnic Han in Xinjiang might not be aware of the existence of the UTC+6 Xinjiang Time because of language barrier, regardless, Beijing Time users in Xinjiang usually schedule their daily activities two hours later than those who live in eastern China. As such, stores and offices in Xinjiang are commonly opening from 10am to 7pm Beijing Time and this is known as the work/rest time in Xinjiang. Hong Kong maintains its own time authority after transfer of sovereignty in 1997, the Hong Kong Time is UTC+08,00 all year round, and daylight saving time has not been used since 1979. Greenwich Mean Time was adopted as the basis in 1904, before that, local time was determined by astronomical observations at Hong Kong Observatory using a 6-inch Lee Equatorial and a 3-inch Transit Circle. Macau maintains its own time authority after transfer of sovereignty in 1999, the Macau Standard Time is the time in Macau

9.
Chinese language
–
Chinese is a group of related, but in many cases mutually unintelligible, language varieties, forming a branch of the Sino-Tibetan language family. Chinese is spoken by the Han majority and many ethnic groups in China. Nearly 1.2 billion people speak some form of Chinese as their first language, the varieties of Chinese are usually described by native speakers as dialects of a single Chinese language, but linguists note that they are as diverse as a language family. The internal diversity of Chinese has been likened to that of the Romance languages, There are between 7 and 13 main regional groups of Chinese, of which the most spoken by far is Mandarin, followed by Wu, Min, and Yue. Most of these groups are mutually unintelligible, although some, like Xiang and certain Southwest Mandarin dialects, may share common terms, all varieties of Chinese are tonal and analytic. Standard Chinese is a form of spoken Chinese based on the Beijing dialect of Mandarin. It is the language of China and Taiwan, as well as one of four official languages of Singapore. It is one of the six languages of the United Nations. The written form of the language, based on the logograms known as Chinese characters, is shared by literate speakers of otherwise unintelligible dialects. Of the other varieties of Chinese, Cantonese is the spoken language and official in Hong Kong and Macau. It is also influential in Guangdong province and much of Guangxi, dialects of Southern Min, part of the Min group, are widely spoken in southern Fujian, with notable variants also spoken in neighboring Taiwan and in Southeast Asia. Hakka also has a diaspora in Taiwan and southeast Asia. Shanghainese and other Wu varieties are prominent in the lower Yangtze region of eastern China, Chinese can be traced back to a hypothetical Sino-Tibetan proto-language. The first written records appeared over 3,000 years ago during the Shang dynasty, as the language evolved over this period, the various local varieties became mutually unintelligible. In reaction, central governments have sought to promulgate a unified standard. Difficulties have included the great diversity of the languages, the lack of inflection in many of them, in addition, many of the smaller languages are spoken in mountainous areas that are difficult to reach, and are often also sensitive border zones. Without a secure reconstruction of proto-Sino-Tibetan, the structure of the family remains unclear. A top-level branching into Chinese and Tibeto-Burman languages is often assumed, the earliest examples of Chinese are divinatory inscriptions on oracle bones from around 1250 BCE in the late Shang dynasty

10.
Standard Chinese
–
Its pronunciation is based on the Beijing dialect, its vocabulary on the Mandarin dialects, and its grammar is based on written vernacular Chinese. Like other varieties of Chinese, Standard Chinese is a language with topic-prominent organization. It has more initial consonants but fewer vowels, final consonants, Standard Chinese is an analytic language, though with many compound words. There exist two standardised forms of the language, namely Putonghua in Mainland China and Guoyu in Taiwan, aside from a number of differences in pronunciation and vocabulary, Putonghua is written using simplified Chinese characters, while Guoyu is written using traditional Chinese characters. There are many characters that are identical between the two systems, in English, the governments of China and Hong Kong use Putonghua, Putonghua Chinese, Mandarin Chinese, and Mandarin, while those of Taiwan, Singapore, and Malaysia, use Mandarin. The name Putonghua also has a long, albeit unofficial, history and it was used as early as 1906 in writings by Zhu Wenxiong to differentiate a modern, standard Chinese from classical Chinese and other varieties of Chinese. For some linguists of the early 20th century, the Putonghua, or common tongue/speech, was different from the Guoyu. The former was a prestige variety, while the latter was the legal standard. Based on common understandings of the time, the two were, in fact, different, Guoyu was understood as formal vernacular Chinese, which is close to classical Chinese. By contrast, Putonghua was called the speech of the modern man. The use of the term Putonghua by left-leaning intellectuals such as Qu Qiubai, prior to this, the government used both terms interchangeably. In Taiwan, Guoyu continues to be the term for Standard Chinese. The term Putonghua, on the contrary, implies nothing more than the notion of a lingua franca, Huayu, or language of the Chinese nation, originally simply meant Chinese language, and was used in overseas communities to contrast Chinese with foreign languages. Over time, the desire to standardise the variety of Chinese spoken in these communities led to the adoption of the name Huayu to refer to Mandarin and it also incorporates the notion that Mandarin is usually not the national or common language of the areas in which overseas Chinese live. The term Mandarin is a translation of Guānhuà, which referred to the lingua franca of the late Chinese empire, in English, Mandarin may refer to the standard language, the dialect group as a whole, or to historic forms such as the late Imperial lingua franca. The name Modern Standard Mandarin is sometimes used by linguists who wish to distinguish the current state of the language from other northern. Chinese has long had considerable variation, hence prestige dialects have always existed. Confucius, for example, used yǎyán rather than colloquial regional dialects, rime books, which were written since the Northern and Southern dynasties, may also have reflected one or more systems of standard pronunciation during those times

11.
Hanyu Pinyin
–
Pinyin, or Hànyǔ Pīnyīn, is the official romanization system for Standard Chinese in mainland China, Malaysia, Singapore, and Taiwan. It is often used to teach Standard Chinese, which is written using Chinese characters. The system includes four diacritics denoting tones, Pinyin without tone marks is used to spell Chinese names and words in languages written with the Latin alphabet, and also in certain computer input methods to enter Chinese characters. The pinyin system was developed in the 1950s by many linguists, including Zhou Youguang and it was published by the Chinese government in 1958 and revised several times. The International Organization for Standardization adopted pinyin as a standard in 1982. The system was adopted as the standard in Taiwan in 2009. The word Hànyǔ means the language of the Han people. In 1605, the Jesuit missionary Matteo Ricci published Xizi Qiji in Beijing and this was the first book to use the Roman alphabet to write the Chinese language. Twenty years later, another Jesuit in China, Nicolas Trigault, neither book had much immediate impact on the way in which Chinese thought about their writing system, and the romanizations they described were intended more for Westerners than for the Chinese. One of the earliest Chinese thinkers to relate Western alphabets to Chinese was late Ming to early Qing Dynasty scholar-official, the first late Qing reformer to propose that China adopt a system of spelling was Song Shu. A student of the great scholars Yu Yue and Zhang Taiyan, Song had been to Japan and observed the effect of the kana syllabaries. This galvanized him into activity on a number of fronts, one of the most important being reform of the script, while Song did not himself actually create a system for spelling Sinitic languages, his discussion proved fertile and led to a proliferation of schemes for phonetic scripts. The Wade–Giles system was produced by Thomas Wade in 1859, and it was popular and used in English-language publications outside China until 1979. This Sin Wenz or New Writing was much more sophisticated than earlier alphabets. In 1940, several members attended a Border Region Sin Wenz Society convention. Mao Zedong and Zhu De, head of the army, both contributed their calligraphy for the masthead of the Sin Wenz Societys new journal. Outside the CCP, other prominent supporters included Sun Yat-sens son, Sun Fo, Cai Yuanpei, the countrys most prestigious educator, Tao Xingzhi, an educational reformer. Over thirty journals soon appeared written in Sin Wenz, plus large numbers of translations, biographies, some contemporary Chinese literature, and a spectrum of textbooks

12.
Cantonese
–
Cantonese, or Standard Cantonese, is a variety of Chinese spoken in the city of Guangzhou in southeastern China. It is the prestige variety of Yue, one of the major subdivisions of Chinese. In mainland China, it is the lingua franca of the province of Guangdong and some neighbouring areas such as Guangxi. In Hong Kong and Macau, Cantonese serves as one of their official languages and it is also spoken amongst overseas Chinese in Southeast Asia and throughout the Western World. When Cantonese and the closely related Yuehai dialects are classified together, Cantonese is viewed as vital part of the cultural identity for its native speakers across large swathes of southeastern China, Hong Kong and Macau. Although Cantonese shares some vocabulary with Mandarin, the two varieties are mutually unintelligible because of differences in pronunciation, grammar and lexicon, sentence structure, in particular the placement of verbs, sometimes differs between the two varieties. This results in the situation in which a Cantonese and a Mandarin text may look similar, in English, the term Cantonese is ambiguous. Cantonese proper is the variety native to the city of Canton and this narrow sense may be specified as Canton language or Guangzhou language in English. However, Cantonese may also refer to the branch of Cantonese that contains Cantonese proper as well as Taishanese and Gaoyang. In this article, Cantonese is used for Cantonese proper, historically, speakers called this variety Canton speech or Guangzhou speech, although this term is now seldom used outside mainland China. In Guangdong province, people call it provincial capital speech or plain speech. In Hong Kong and Macau, as well as among overseas Chinese communities, in mainland China, the term Guangdong speech is also increasingly being used among both native and non-native speakers. Due to its status as a prestige dialect among all the dialects of the Cantonese or Yue branch of Chinese varieties, the official languages of Hong Kong are Chinese and English, as defined in the Hong Kong Basic Law. The Chinese language has different varieties, of which Cantonese is one. Given the traditional predominance of Cantonese within Hong Kong, it is the de facto official spoken form of the Chinese language used in the Hong Kong Government and all courts and it is also used as the medium of instruction in schools, alongside English. A similar situation exists in neighboring Macau, where Chinese is an official language along with Portuguese. As in Hong Kong, Cantonese is the predominant spoken variety of Chinese used in life and is thus the official form of Chinese used in the government. The variant spoken in Hong Kong and Macau is known as Hong Kong Cantonese, Cantonese first developed around the port city of Guangzhou in the Pearl River Delta region of southeastern China

13.
Jyutping
–
Jyutping is a romanisation system for Cantonese developed by the Linguistic Society of Hong Kong, an academic group, in 1993. Its formal name is The Linguistic Society of Hong Kong Cantonese Romanisation Scheme, the LSHK promotes the use of this romanisation system. The name Jyutping is a contraction consisting of the first Chinese characters of the terms Jyut6jyu5, only the finals m and ng can be used as standalone nasal syllables. ^ ^ ^ Referring to the pronunciation of these words. There are nine tones in six distinct tone contours in Cantonese, however, as three of the nine are entering tones, which only appear in syllables ending with p, t, and k, they do not have separate tone numbers in Jyutping. Jyutping and the Yale Romanisation of Cantonese represent Cantonese pronunciations with the letters in, The initials, b, p, m, f, d, t, n, l, g, k, ng, h, s, gw, kw. The vowel, aa, a, e, i, o, u, the coda, i, u, m, n, ng, p, t, k. But they differ in the following, The vowels eo and oe represent /ɵ/ and /œː/ respectively in Jyutping, the initial j represents /j/ in Jyutping whereas y is used instead in Yale. The initial z represents /ts/ in Jyutping whereas j is used instead in Yale, the initial c represents /tsʰ/ in Jyutping whereas ch is used instead in Yale. In Jyutping, if no consonant precedes the vowel yu, then the initial j is appended before the vowel, in Yale, the corresponding initial y is never appended before yu under any circumstances. Jyutping defines three finals not in Yale, eu /ɛːu/, em /ɛːm/, and ep /ɛːp/ and these three finals are used in colloquial Cantonese words, such as deu6, lem2, and gep6. To represent tones, only tone numbers are used in Jyutping whereas Yale traditionally uses tone marks together with the letter h. Jyutping and Cantonese Pinyin represent Cantonese pronunciations with the letters in, The initials, b, p, m, f, d, t, n, l, g, k, ng, h, s, gw, kw. The vowel, aa, a, e, i, o, u, the coda, i, u, m, n, ng, p, t, k. But they have differences, The vowel oe represents both /ɵ/ and /œː/ in Cantonese Pinyin whereas eo and oe represent /ɵ/ and /œː/ respectively in Jyutping. The vowel y represents /y/ in Cantonese Pinyin whereas both yu and i are used in Jyutping, the initial dz represents /ts/ in Cantonese Pinyin whereas z is used instead in Jyutping. The initial ts represents /tsʰ/ in Cantonese Pinyin whereas c is used instead in Jyutping. To represent tones, the numbers 1 to 9 are usually used in Cantonese Pinyin, however, only the numbers 1 to 6 are used in Jyutping

14.
County (PRC)
–
There are 1,464 counties in Mainland China out of a total of 2,862 county-level divisions. Xian have existed since the Warring States period, and were established nationwide during the Qin Dynasty, the term xian is usually translated as districts or prefectures when put in the context of Chinese history. This article, however, will try to keep the terminology consistent with the modern translation, xian have existed since the Warring States period and were set up nationwide by the Qin Dynasty. The number of counties in China proper gradually increased from dynasty to dynasty, as Qin Shi Huang reorganized the counties after his unification, there were about 1,000. Under the Eastern Han Dynasty, the number of counties increased to above 1,000, about 1400 existed when the Sui dynasty abolished the commandery level, which was the level just above counties, and demoted some commanderies to counties. The current number of counties mostly resembled that of the years of Qing Dynasty. Changes of location and names of counties in Chinese history have been a field of research in Chinese historical geography. Government below the county level was often undertaken through informal non-bureaucratic means, the head of a county was the magistrate, who oversaw both the day-to-day operations of the county as well as civil and criminal cases. Autonomous counties are a class of counties in Mainland China reserved for non-Han Chinese ethnic minorities. Autonomous counties are all over China, and are given, by law. There are 117 autonomous counties in Mainland China, as the Communist Party of China is central to directing government policy in Mainland China, every level of administrative division has a local CPC Committee. A countys is called the CPC County Committee and the called the Secretary. Policies are carried out via the Peoples government of the county, the governor is often also one of the deputy secretaries in the CPC Committee. County List of counties in the Peoples Republic of China List of county-level divisions of China History of the divisions of China

15.
Silk Road
–
While the term is of modern coinage, the Silk Road derives its name from the lucrative trade in silk carried out along its length, beginning during the Han dynasty. The Han dynasty expanded Central Asian sections of the routes around 114 BCE, largely through missions and explorations of the Chinese imperial envoy. The Chinese took great interest in the safety of their trade products, though silk was certainly the major trade item exported from China, many other goods were traded, as well as religions, syncretic philosophies, and various technologies. Diseases, most notably plague, also spread along the Silk Routes, in addition to economic trade, the Silk Road was a route for cultural trade among the civilizations along its network. The main traders during antiquity included the Chinese, Arabs, Turkmens, Indians, Persians, Somalis, Greeks, Syrians, Romans, Georgians, Armenians, Bactrians, in June 2014, UNESCO designated the Changan-Tianshan corridor of the Silk Road as a World Heritage Site. The Silk Road derives its name from the lucrative Eurasian silk and horse trade, the German terms Seidenstraße and Seidenstraßen were coined by Ferdinand von Richthofen, who made seven expeditions to China from 1868 to 1872. The term Silk Route is also used, although the term was coined in the 19th century, it did not gain widespread acceptance in academia or popularity among the public until the 20th century. The first book entitled The Silk Road was by Swedish geographer Sven Hedin in 1938, the fall of the Soviet Union and Iron Curtain in 1989 led to a surge of public and academic interest in Silk Road sites and studies in the former Soviet republics of Central Asia. Use of the term Silk Road is not without its detractors and he notes that traditional authors discussing East-West trade such as Marco Polo and Edward Gibbon never labelled any route as a silk one in particular. From the 2nd millennium BCE, nephrite jade was being traded from mines in the region of Yarkand, some remnants of what was probably Chinese silk dating from 1070 BCE have been found in Ancient Egypt. The Great Oasis cities of Central Asia played a role in the effective functioning of the Silk Road trade. This style is reflected in the rectangular belt plaques made of gold and bronze, with other versions in jade. The tomb of a Scythian prince near Stuttgart, Germany, dated to the 6th century BCE, was excavated and found to have not only Greek bronzes but also Chinese silks. Scythians accompanied the Assyrian Esarhaddon on his invasion of Egypt, soghdian Scythian merchants played a vital role in later periods in the development of the Silk Road. By the time of Herodotus, the Royal Road of the Persian Empire ran some 2,857 km from the city of Susa on the Karun to the port of Smyrna on the Aegean Sea. It was maintained and protected by the Achaemenid Empire and had postal stations, by having fresh horses and riders ready at each relay, royal couriers could carry messages the entire distance in nine days, while normal travellers took about three months. The next major step in the development of the Silk Road was the expansion of the Greek empire of Alexander the Great into Central Asia and this later became a major staging point on the northern Silk Route. They continued to expand eastward, especially during the reign of Euthydemus, there are indications that he may have led expeditions as far as Kashgar in Chinese Turkestan, leading to the first known contacts between [China and the West around 200 BCE

16.
Mogao Caves
–
The caves contain some of the finest examples of Buddhist art spanning a period of 1,000 years. The first caves were dug out in 366 AD as places of Buddhist meditation, the Mogao Caves are the best known of the Chinese Buddhist grottoes and, along with Longmen Grottoes and Yungang Grottoes, are one of the three famous ancient Buddhist sculptural sites of China. An important cache of documents was discovered in 1900 in the so-called Library Cave, the caves themselves are now a popular tourist destination, with a number open for visiting. Dunhuang was established as a frontier garrison outpost by the Han Dynasty Emperor Wudi to protect against the Xiongnu in 111 BC. It also became an important gateway to the West, a centre of commerce along the Silk Road, as well as a place of various people. The construction of the Mogao Caves near Dunhuang is generally taken to have begun sometime in the fourth century AD. The story is found in other sources, such as in inscriptions on a stele in cave 332. He was later joined by a second monk Faliang, and the site gradually grew, members of the ruling family of Northern Wei and Northern Zhou constructed many caves here, and it flourished in the short-lived Sui Dynasty. By the Tang Dynasty, the number of caves had reached over a thousand, from the 4th until the 14th century, caves were constructed by monks to serve as shrines with funds from donors. The major caves were sponsored by such as important clergy, local ruling elite, foreign dignitaries. Other caves may have been funded by merchants, military officers, during the Tang Dynasty, Dunhuang became the main hub of commerce of the Silk Road and a major religious centre. The site escaped the persecution of Buddhists ordered by Emperor Wuzong in 845 as it was then under Tibetan control, as a frontier town, Dunhuang had been occupied at various times by other non-Han Chinese people. After the Tang Dynasty, the site went into a gradual decline, by then Islam had conquered much of Central Asia, and the Silk Road declined in importance when trading via sea-routes began to dominate Chinese trade with the outside world. During the Ming Dynasty, the Silk Road was finally officially abandoned, the biggest discovery, however, came from a Chinese Taoist named Wang Yuanlu who appointed himself guardian of some of these temples around the turn of the century. Some of the caves had by then been blocked by sand, in one such cave, on 25 June 1900, Wang discovered a walled up area behind one side of a corridor leading to a main cave. Behind the wall was a small cave stuffed with a hoard of manuscripts. Words of Wangs discovery drew the attention of a joint British/Indian group led by Hungarian archaeologist Aurel Stein who was on an expedition in the area in 1907. Stein negotiated with Wang to allow him to remove a significant number of manuscripts as well as the finest paintings, a well-known scholar Luo Zhenyu edited some of the manuscripts Pelliot acquired into a volume which was then published in 1909 as Manuscripts of the Dunhuang Caves

17.
Uyghur language
–
Significant communities of Uyghur-speakers are located in Kazakhstan and Uzbekistan, and various other countries have Uyghur-speaking expatriate communities. Uyghur belongs to the Karluk branch of the Turkic language family, like many other Turkic languages, Uyghur displays vowel harmony and agglutination, lacks noun classes or grammatical gender, and is a left-branching language with subject–object–verb word order. More distinctly Uyghur processes include, especially in dialects, vowel reduction. In addition to influence of other Turkic languages, Uyghur has historically been influenced strongly by Persian and Arabic, the modified Arabic-derived writing system is the most common and the only standard in China, although other writing systems are used for auxiliary and historical purposes. Unlike most Arabic-derived scripts, the Uyghur Arabic alphabet has mandatory marking of all due to modifications to the original Perso-Arabic script made in the 20th century. Two Latin and one Cyrillic alphabet are used, though to a much lesser extent. The Arabic and Latin alphabets both have 32 characters, the Middle Turkic languages are the direct ancestor of the Karluk languages, including Uyghur and the Uzbek language. Kagan Arik wrote that Modern Uyghur is not descended from Old Uyghur, rather, according to Gerard Clauson, Western Yugur is considered to be the true descendant of Old Uyghur, and is also called Neo-Uyghur. Modern Uyghur is not a descendant of Old Uyghur, but is descended from the Xākānī language described by Mahmud al-Kashgari in Dīwānu l-Luġat al-Turk, the Western Yugur language, although in geographic proximity, is more closely related to the Siberian Turkic languages in Siberia. Robert Dankoff wrote that the Turkic language spoken in Kashgar and used in Kara Khanid works was Karluk, robert Barkley Shaw wrote, In the Turkish of Káshghar and Yarkand. This would seem in many case to be a misnomer as applied to the language of Kashghar. Other Kara-Khanid writers wrote works in the Turki Karluk Khaqani language, yusuf Khass Hajib wrote the Kutadgu Bilig. Ahmad bin Mahmud Yukenaki wrote the Hibat al-ḥaqāyiq, after Chaghatai fell into extinction, the standard versions of Uyghur and Uzbek were developed from dialects in the Chagatai-speaking region, showing abundant Chaghatai influence. Uyghur language today shows considerable Persian influence as a result from Chagatai, Modern Uyghur religious literature includes the Taẕkirah, biographies of Islamic religious figures and saints. The Taẕkirah is a genre of literature written about Sufi Muslim saints in Altishahr, the shrines of Sufi Saints are revered in Altishahr as one of Islams essential components and the tazkirah literature reinforced the sacredness of the shrines. Anyone who does not believe in the stories of the saints is guaranteed hellfire by the tazkirahs and it is written, And those who doubt Their Holinesses the Imams will leave this world without faith, and on Judgement Day their faces will be black. In the Tazkirah of the Four Sacrificed Imams, Shaw translated extracts from the Tazkiratul-Bughra on the Muslim Turki war against the infidel Khotan. The Turki-language Tadhkirah i Khwajagan was written by M. Sadiq Kashghari, historical works like the Tārīkh-i amniyya and Tārīkh-i ḥamīdi were written by Musa Sayrami

18.
Oasis
–
In geography, an oasis is an isolated area of vegetation in a desert, typically surrounding a spring or similar water source, such as a pond or small lake. Oases also provide habitat for animals and even if the area is big enough. The location of oases has been of importance for trade and transportation routes in desert areas, caravans must travel via oases so that supplies of water. Thus, political or military control of an oasis has in many cases meant control of trade on a particular route. For example, the oases of Awjila, Ghadames, and Kufra, oases are formed from underground rivers or aquifers such as an artesian aquifer, where water can reach the surface naturally by pressure or by man-made wells. Occasional brief thunderstorms provide subterranean water to sustain natural oases, such as the Tuat, substrata of impermeable rock and stone can trap water and retain it in pockets, or on long faulting subsurface ridges or volcanic dikes water can collect and percolate to the surface. Any incidence of water is used by migrating birds, which also pass seeds with their droppings which will grow at the waters edge forming an oasis. It can also be used to plant crops, the word oasis came into English via Latin, oasis from Ancient Greek, ὄασις óasis, which in turn is a direct borrowing from Demotic Egyptian. The word for oasis in the later attested Coptic language is wahe or ouahe which means a dwelling place, people who live in an oasis must manage land and water use carefully, fields must be irrigated to grow plants like apricots, dates, figs, and olives. The most important plant in an oasis is the date palm and these palm trees provide shade for smaller trees like peach trees, which form the middle layer. By growing plants in different layers, the farmers make best use of the soil, many vegetables are also grown and some cereals, such as barley, millet, and wheat, are grown where there is more moisture. Great Man-Made River – the worlds largest irrigation project, developed in Libya to connect cities with fossil water. Guelta Mirage Oasification Qanat Wadi Water supply référence, Jardins au désert |Battesti, Jardins au désert, Evolution des pratiques et savoirs oasiens, Jérid tunisien, Paris, Éditions IRD, coll. À travers champs,2005,440 p. ISBN 2-7099-1564-2 Open Archives, book in free access / in French The dictionary definition of oasis at Wiktionary

19.
Crescent Lake (Dunhuang)
–
Yueyaquan is a crescent-shaped lake in an oasis,6 km south of the city of Dunhuang in Gansu Province, China. It was named Yueyaquan in the Qing Dynasty, according to measurements made in 1960, the average depth of the lake was 4 to 5 meters, with a maximum depth of 7.5 metres. In the following 40 years, the depth of the lake continually declined, in the early 1990s, its area had shrunk to only 1.37 acres with an average depth of 0.9 meter. In 2006, the government with help of the central government started to fill the lake and restore its depth, its depth. The lake and the deserts are very popular with tourists

20.
Singing sand
–
Singing sand, also called whistling sand or barking sand, is sand that produces sound. The sound emission may be caused by passing over dunes or by walking on the sand. Certain conditions have to come together to create singing sand, The sand grains have to be round, the sand has to contain silica. The sand needs to be at a certain humidity, the most common frequency emitted seems to be close to 450 Hz. There are various theories about the singing sand mechanism and it has been proposed that the sound frequency is controlled by the shear rate. Others have suggested that the frequency of vibration is related to the thickness of the dry layer of sand. The sound waves back and forth between the surface of the dune and the surface of the moist layer, creating a resonance that increases the sounds volume. The noise may be generated by friction between the grains or by the compression of air between them, other sounds that can be emitted by sand have been described as roaring or booming. Singing sand dunes, an example of the phenomenon of singing sand, produce a sound described as roaring, booming, squeaking, or the Song of Dunes. This is a natural phenomenon of up to 105 decibels, lasting as long as several minutes. The sound is similar to a loud low-pitch rumble and it emanates from crescent-shaped dunes, or barchans. The sound emission accompanies a slumping or avalanching movement of sand, on some beaches around the world, dry sand will make a singing, squeaking, whistling, or barking sound if a person scuffs or shuffles their feet with sufficient force. The phenomenon is not completely understood scientifically, but it has found that quartz sand will do this if the grains are very well-rounded. The singing sound is believed to be produced by shear as each layer of sand grains slides over the layer beneath it. The similarity in size, the uniformity, and the mean that grains move up. Even small amounts of pollution on the sand grains reduces the friction enough to silence the sand and it has also been speculated that thin layers of gas trapped and released between the grains act as percussive cushions capable of vibration, and so produce the tones heard. Not all sands sing, whistle or bark alike, the sounds heard have a wide frequency range that can be different for each patch of sand. Fine sands, where individual grains are barely visible to the eye, produce only a poor

21.
Silk Route
–
While the term is of modern coinage, the Silk Road derives its name from the lucrative trade in silk carried out along its length, beginning during the Han dynasty. The Han dynasty expanded Central Asian sections of the routes around 114 BCE, largely through missions and explorations of the Chinese imperial envoy. The Chinese took great interest in the safety of their trade products, though silk was certainly the major trade item exported from China, many other goods were traded, as well as religions, syncretic philosophies, and various technologies. Diseases, most notably plague, also spread along the Silk Routes, in addition to economic trade, the Silk Road was a route for cultural trade among the civilizations along its network. The main traders during antiquity included the Chinese, Arabs, Turkmens, Indians, Persians, Somalis, Greeks, Syrians, Romans, Georgians, Armenians, Bactrians, in June 2014, UNESCO designated the Changan-Tianshan corridor of the Silk Road as a World Heritage Site. The Silk Road derives its name from the lucrative Eurasian silk and horse trade, the German terms Seidenstraße and Seidenstraßen were coined by Ferdinand von Richthofen, who made seven expeditions to China from 1868 to 1872. The term Silk Route is also used, although the term was coined in the 19th century, it did not gain widespread acceptance in academia or popularity among the public until the 20th century. The first book entitled The Silk Road was by Swedish geographer Sven Hedin in 1938, the fall of the Soviet Union and Iron Curtain in 1989 led to a surge of public and academic interest in Silk Road sites and studies in the former Soviet republics of Central Asia. Use of the term Silk Road is not without its detractors and he notes that traditional authors discussing East-West trade such as Marco Polo and Edward Gibbon never labelled any route as a silk one in particular. From the 2nd millennium BCE, nephrite jade was being traded from mines in the region of Yarkand, some remnants of what was probably Chinese silk dating from 1070 BCE have been found in Ancient Egypt. The Great Oasis cities of Central Asia played a role in the effective functioning of the Silk Road trade. This style is reflected in the rectangular belt plaques made of gold and bronze, with other versions in jade. The tomb of a Scythian prince near Stuttgart, Germany, dated to the 6th century BCE, was excavated and found to have not only Greek bronzes but also Chinese silks. Scythians accompanied the Assyrian Esarhaddon on his invasion of Egypt, soghdian Scythian merchants played a vital role in later periods in the development of the Silk Road. By the time of Herodotus, the Royal Road of the Persian Empire ran some 2,857 km from the city of Susa on the Karun to the port of Smyrna on the Aegean Sea. It was maintained and protected by the Achaemenid Empire and had postal stations, by having fresh horses and riders ready at each relay, royal couriers could carry messages the entire distance in nine days, while normal travellers took about three months. The next major step in the development of the Silk Road was the expansion of the Greek empire of Alexander the Great into Central Asia and this later became a major staging point on the northern Silk Route. They continued to expand eastward, especially during the reign of Euthydemus, there are indications that he may have led expeditions as far as Kashgar in Chinese Turkestan, leading to the first known contacts between [China and the West around 200 BCE

22.
Lhasa
–
Lhasa is a city and administrative capital of the Tibet Autonomous Region of the Peoples Republic of China. Lhasa is the second most populous city on the Tibetan Plateau after Xining and, at an altitude of 3,490 metres, the city has been the religious and administrative capital of Tibet since the mid-17th century. It contains many culturally significant Tibetan Buddhist sites such as the Potala Palace, Jokhang Temple, Lhasa literally means place of the gods. Lhasa is first recorded as the name, referring to the temple of Jowo. By the mid 7th century, Songtsän Gampo became the leader of the Tibetan Empire that had risen to power in the Brahmaputra River Valley, Bhrikuti is said to have converted him to Buddhism, which was also the faith attributed to his second wife Wencheng. In 641 he constructed the Jokhang and Ramoche Temples in Lhasa in order to house two Buddha statues, the Akshobhya Vajra and the Jowo Sakyamuni, respectively brought to his court by the princesses. Lhasa suffered extensive damage under the reign of Langdarma in the 9th century, when the sites were destroyed and desecrated. A Tibetan tradition mentions that after Songtsän Gampos death in 649 C. E. Chinese troops captured Lhasa, Chinese and Tibetan scholars have noted that the event is mentioned neither in the Chinese annals nor in the Tibetan manuscripts of Dunhuang. Lǐ suggested that this tradition may derive from an interpolation, tsepon W. D. Shakabpa believes that those histories reporting the arrival of Chinese troops are not correct. From the fall of the monarchy in the 9th century to the accession of the 5th Dalai Lama, however, the importance of Lhasa as a religious site became increasingly significant as the centuries progressed. It was known as the centre of Tibet where Padmasambhava magically pinned down the earth demoness, islam has been present since the 11th century in what is considered to have always been a monolithically Buddhist culture. Two Tibetan Muslim communities have lived in Lhasa with distinct homes, food and clothing, language, education, trade, by the 15th century, the city of Lhasa had risen to prominence following the founding of three large Gelugpa monasteries by Je Tsongkhapa and his disciples. The three monasteries are Ganden, Sera and Drepung which were built as part of the puritanical Buddhist revival in Tibet, the scholarly achievements and political know-how of this Gelugpa Lineage eventually pushed Lhasa once more to centre stage. The 5th Dalai Lama, Lobsang Gyatso, unified Tibet and moved the centre of his administration to Lhasa in 1642 with the help of Güshi Khan of the Khoshut. With Güshi Khan as a largely uninvolved overlord, the 5th Dalai Lama, the core leadership of this government is also referred to as the Ganden Phodrang, and Lhasa thereafter became both the religious and political capital. In 1645, the reconstruction of the Potala Palace began on Red Hill, in 1648, the Potrang Karpo of the Potala was completed, and the Potala was used as a winter palace by the Dalai Lama from that time onwards. The Potrang Marpo was added between 1690 and 1694, the name Potala is derived from Mount Potalaka, the mythical abode of the Dalai Lamas divine prototype, the Bodhisattva Avalokiteśvara. The Jokhang Temple was also expanded around this time

23.
Mongolia
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Mongolia /mɒŋˈɡoʊliə/ is a landlocked unitary sovereign state in East Asia. Its area is equivalent with the historical territory of Outer Mongolia. It is sandwiched between China to the south and Russia to the north, while it does not share a border with Kazakhstan, Mongolia is separated from it by only 36.76 kilometers. At 1,564,116 square kilometers, Mongolia is the 18th largest and it is also the worlds second-largest landlocked country behind Kazakhstan and the largest landlocked country that does not border a closed sea. The country contains very little land, as much of its area is covered by grassy steppe, with mountains to the north and west. Ulaanbaatar, the capital and largest city, is home to about 45% of the countrys population, approximately 30% of the population is nomadic or semi-nomadic, horse culture is still integral. The majority of its population are Buddhists, the non-religious population is the second largest group. Islam is the dominant religion among ethnic Kazakhs, the majority of the states citizens are of Mongol ethnicity, although Kazakhs, Tuvans, and other minorities also live in the country, especially in the west. Mongolia joined the World Trade Organization in 1997 and seeks to expand its participation in regional economic, the area of what is now Mongolia has been ruled by various nomadic empires, including the Xiongnu, the Xianbei, the Rouran, the Turkic Khaganate, and others. In 1206, Genghis Khan founded the Mongol Empire, which became the largest contiguous empire in history. His grandson Kublai Khan conquered China to establish the Yuan dynasty, after the collapse of the Yuan, the Mongols retreated to Mongolia and resumed their earlier pattern of factional conflict, except during the era of Dayan Khan and Tumen Zasagt Khan. In the 16th century, Tibetan Buddhism began to spread in Mongolia, being led by the Manchu-founded Qing dynasty. By the early 1900s, almost one-third of the male population were Buddhist monks. After the collapse of the Qing dynasty in 1911, Mongolia declared independence from the Qing dynasty, shortly thereafter, the country came under the control of the Soviet Union, which had aided its independence from China. In 1924, the Mongolian Peoples Republic was declared as a Soviet satellite state, after the anti-Communist revolutions of 1989, Mongolia conducted its own peaceful democratic revolution in early 1990. This led to a multi-party system, a new constitution of 1992, homo erectus inhabited Mongolia from 850,000 years ago. Modern humans reached Mongolia approximately 40,000 years ago during the Upper Paleolithic, the Khoit Tsenkher Cave in Khovd Province shows lively pink, brown, and red ochre paintings of mammoths, lynx, bactrian camels, and ostriches, earning it the nickname the Lascaux of Mongolia. The venus figurines of Malta testify to the level of Upper Paleolithic art in northern Mongolia, the wheeled vehicles found in the burials of the Afanasevans have been dated to before 2200 BC

24.
Siberia
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Siberia is an extensive geographical region, and by the broadest definition is also known as North Asia. Siberia has historically been a part of Russia since the 17th century, the territory of Siberia extends eastwards from the Ural Mountains to the watershed between the Pacific and Arctic drainage basins. It stretches southwards from the Arctic Ocean to the hills of north-central Kazakhstan and to the borders of Mongolia. With an area of 13.1 million square kilometres, Siberia accounts for 77% of Russias land area and this is equivalent to an average population density of about 3 inhabitants per square kilometre, making Siberia one of the most sparsely populated regions on Earth. If it were a country by itself, it would still be the largest country in area, the origin of the name is unknown. Some sources say that Siberia originates from the Siberian Tatar word for sleeping land, another account sees the name as the ancient tribal ethnonym of the Sirtya, a folk, which spoke a language that later evolved into the Ugric languages. This ethnic group was assimilated to the Siberian Tatar people. The modern usage of the name was recorded in the Russian language after the Empires conquest of the Siberian Khanate, a further variant claims that the region was named after the Xibe people. The Polish historian Chycliczkowski has proposed that the name derives from the word for north. He said that the neighbouring Chinese, Arabs and Mongolians would not have known Russian and he suggests that the name is a combination of two words, su and bir. The region is of significance, as it contains bodies of prehistoric animals from the Pleistocene Epoch. Specimens of Goldfuss cave lion cubs, Yuka and another woolly mammoth from Oymyakon, a rhinoceros from the Kolyma River. The Siberian Traps were formed by one of the largest known volcanic events of the last 500 million years of Earths geological history. They continued for a million years and are considered a cause of the Great Dying about 250 million years ago. At least three species of human lived in Southern Siberia around 40,000 years ago, H. sapiens, H. neanderthalensis, the last was determined in 2010, by DNA evidence, to be a new species. Siberia was inhabited by different groups of such as the Enets, the Nenets, the Huns, the Scythians. The Khan of Sibir in the vicinity of modern Tobolsk was known as a prominent figure who endorsed Kubrat as Khagan of Old Great Bulgaria in 630, the Mongols conquered a large part of this area early in the 13th century. With the breakup of the Golden Horde, the autonomous Khanate of Sibir was established in the late 15th century, turkic-speaking Yakut migrated north from the Lake Baikal region under pressure from the Mongol tribes during the 13th to 15th century

25.
Hexi Corridor
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Hexi Corridor or Gansu Corridor refers to the historical route in Gansu province of China. The corridor is a string of oases along the edge of the Tibetan Plateau. To the south is the high and desolate Tibetan Plateau and to the north, the Gobi Desert, at the west end the route splits in three, going either north of the Tian Shan or south on either side of the Tarim Basin. At the east end are mountains around Lanzhou before one reaches the Wei River valley, cultivated wheat, originating at the Fertile Crescent, already appeared in China around 2800 BC at Donghuishan at the Hexi corridor. Several other crops are also attested at this time period, xishanping is another similar site in Gansu. According to Dodson et al. wheat entered via the Hexi Corridor into northern Gangsu around 3000 BC, although other scholars date this somewhat later. The Chinese millets, rice, as well as other crops travelled the opposite way through the Corridor, as early as the 1st millennium BCE, silk goods began appearing in Siberia, having traveled over the Northern branch of the Silk Road, including the Hexi Corridor segment. At the end of the Qin dynasty, the Yuezhi overcame previous settlers, later, Northern Xiongnu armies vanquished the Yuezhi and established dominance here during the early Han dynasty. During the Han–Xiongnu War, Han China expelled the Xiongnu from the Hexi Corridor in 121 BCE, the Han acquired a territory stretching from the Hexi Corridor to Lop Nur, thus cutting the Xiongnu off from their Qiang allies. Again, Han forces repelled a joint Xiongnu-Qiang invasion of this territory in 111 BCE. After 111 BCE, new outposts were established, four of them in the Hexi Corridor, namely Jiuquan, Zhangye, Dunhuang, from roughly 115–60 BCE, Han forces fought the Xiongnu over control of the oasis city-states in the Tarim Basin. Han was eventually victorious and established the Protectorate of the Western Regions in 60 BCE, which dealt with the regions defense and foreign affairs. During the turbulent reign of Wang Mang, Han lost control over the Tarim Basin, which was conquered by the Xiongnu in 63 CE, and used as a base to invade the Hexi Corridor. Dou Gu defeated the Xiongnu again at the Battle of Yiwulu in 73 CE, evicting them from Turpan and chasing them as far as Lake Barkol before establishing a garrison at Hami. After the new Protector General of the Western Regions Chen Mu was killed in 75 CE by allies of the Xiongnu in Karasahr and Kucha, at the Battle of the Altai Mountains in 89 CE, Dou Xian defeated the Northern Chanyu, who retreated into the Altai Mountains. The Tang dynasty fought the Tibetan Empire for control of areas in Inner, there was a long string of conflicts with Tibet over territories in the Tarim Basin between 670–692 CE. In 763 the Tibetans even captured the Tang capital of Changan for fifteen days during the An Lushan Rebellion. It was during this rebellion that the Tang withdrew its western garrisons stationed in what is now Gansu and Qinghai, hostilities between the Tang and Tibet continued until they signed a formal peace treaty in 821

26.
Chang'an
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Changan is an ancient capital of more than ten dynasties in Chinese history, today known as Xian. Changan means Perpetual Peace in Classical Chinese, during the short-lived Xin dynasty, the city was renamed Constant Peace, yet after its fall in AD23, the old name was restored. By the time of the Ming dynasty, the name was changed to Xian, meaning Western Peace. Changan had been settled since Neolithic times, during which the Yangshao Culture was established in Banpo in the citys suburb, from its capital at Xianyang, the Qin dynasty ruled a larger area than either of the preceding dynasties. The imperial city of Changan during the Han dynasty was located northwest of todays Xian. During the Tang dynasty, the area to be known as Changan included the area inside the Ming Xian fortification, plus small areas to its east and west. The Tang Changan hence, was 8 times the size of the Ming Xian, during its heyday, Changan was one of the largest and most populous cities in the world. Around AD750, Changan was called a million peoples city in Chinese records, while modern estimates put it at around 800, 000–1,000,000 within city walls. According to the census in 742 recorded in the New Book of Tang,362,921 families with 1,960,188 persons were counted in Jingzhao Fu, the strategic and economic importance of ancient Changan was mainly due to its central position. The roads leading to Gansu, Sichuan, Henan, Hubei, the site of the Han capital was located 3 km northwest of modern Xian. As the capital of the Western Han, it was the political, economic and it was also the eastern terminus of the Silk Road, and a cosmopolitan metropolis. By 2 AD, the population was 246,200 in 80,000 households and this population consisted mostly of the scholar gentry class whose education was being sponsored by their wealthy aristocratic families. In addition to civil servants was a larger underclass to serve them. Initially, Emperor Liu Bang decided to build his capital at the center of the sun and this location was the site of the holy city Chengzhou, home of the last Zhou emperors. The magical significance of location was believed to ensure a long-lasting dynasty like the Zhou. However, in practice the strategic value of a capital located in the Wei Valley became the deciding factor for locating the new capital. To this end, it is recorded c 200 BC he forcibly relocated thousands of clans in the aristocracy to this region. First, it kept all potential rivals close to the new Emperor and his adviser Liu Jing described this plan as weakening the root while strengthening the branch

27.
Luoyang
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Luoyang, formerly romanized as Loyang, is a city located in the confluence area of Luo River and Yellow River in Central China. It is a city in western Henan province. It borders the capital of Zhengzhou to the east, Pingdingshan to the southeast, Nanyang to the south, Sanmenxia to the west, Jiyuan to the north. Situated on the plain of China, Luoyang is one of the cradles of Chinese civilization. The name Luoyang originates from the location on the north or sunny side of the Luo River. Since the river flows from west to east and the sun is to the south of the river, Luoyang has had several names over the centuries, including Luoyi and Luozhou, though Luoyang has been its primary name. It has been called, during various periods, Dongdu, Xijing, during the rule of Wu Zetian, the city was known as Shendu The greater Luoyang area has been sacred ground since the late Neolithic period. This area at the intersection of the Luo river and Yi River was considered to be the center of China. Because of this aspect, several cities – all of which are generally referred to as Luoyang – have been built in this area. In 2070 BC, the Xia Dynasty king Tai Kang moved the Xia capital to the intersection of the Luo and Yi, in 1600 BC, Tang of Shang defeated Jie, the final Xia Dynasty king, and built Western Bo, a new capital on the Luo River. The ruins of Western Bo are located in Luoyang Prefecture, in the 1136 BC a settlement named Chengzhou was constructed by the Duke of Zhou for the remnants of the captured Shang nobility. The Duke also moved the Nine Tripod Cauldrons to Chengzhou from the Zhou Dynasty capital at Haojing, a second Western Zhou capital, Wangcheng was built 15 km west of Chengzhou. Wangcheng became the capital of the Eastern Zhou Dynasty in 771 BC, the Eastern Zhou Dynasty capital was moved to Chengzhou in 510 BC. Later, the Eastern Han Dynasty capital of Luoyang would be built over Chengzhou, modern Luoyang is built over the ruins of Wangcheng, which are still visible today at Wangcheng Park. In 25 AD, Luoyang was declared the capital of the Eastern Han Dynasty on November 27 by Emperor Guangwu of Han, for several centuries, Luoyang was the focal point of China. In AD68, the White Horse Temple, the first Buddhist temple in China, was founded in Luoyang, the temple still exists, though the architecture is of later origin, mainly from the 16th century. An Shigao was one of the first monks to popularize Buddhism in Luoyang, in 190 AD, Chancellor Dong Zhuo ordered his soldiers to ransack, pillage, and raze the city as he retreated from the coalition set up against him by regional lords from across China. The court was moved to the more defensible western city of Changan

28.
Han Dynasty
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The Han dynasty was the second imperial dynasty of China, preceded by the Qin dynasty and succeeded by the Three Kingdoms period. Spanning over four centuries, the Han period is considered an age in Chinese history. To this day, Chinas majority ethnic group refers to itself as the Han people and it was founded by the rebel leader Liu Bang, known posthumously as Emperor Gaozu of Han, and briefly interrupted by the Xin dynasty of the former regent Wang Mang. This interregnum separates the Han dynasty into two periods, the Western Han or Former Han and the Eastern Han or Later Han, the emperor was at the pinnacle of Han society. He presided over the Han government but shared power with both the nobility and appointed ministers who came largely from the gentry class. The Han Empire was divided into areas controlled by the central government using an innovation inherited from the Qin known as commanderies. These kingdoms gradually lost all vestiges of their independence, particularly following the Rebellion of the Seven States, from the reign of Emperor Wu onward, the Chinese court officially sponsored Confucianism in education and court politics, synthesized with the cosmology of later scholars such as Dong Zhongshu. This policy endured until the fall of the Qing dynasty in 1911 AD, the Han dynasty was an age of economic prosperity and saw a significant growth of the money economy first established during the Zhou dynasty. The coinage issued by the government mint in 119 BC remained the standard coinage of China until the Tang dynasty. The period saw a number of limited institutional innovations, the Xiongnu, a nomadic steppe confederation, defeated the Han in 200 BC and forced the Han to submit as a de facto inferior partner, but continued their raids on the Han borders. Emperor Wu of Han launched several campaigns against them. The ultimate Han victory in these wars eventually forced the Xiongnu to accept vassal status as Han tributaries, the territories north of Hans borders were quickly overrun by the nomadic Xianbei confederation. Imperial authority was seriously challenged by large Daoist religious societies which instigated the Yellow Turban Rebellion. When Cao Pi, King of Wei, usurped the throne from Emperor Xian, following Liu Bangs victory in the Chu–Han Contention, the resulting Han dynasty was named after the Hanzhong fief. Chinas first imperial dynasty was the Qin dynasty, the Qin unified the Chinese Warring States by conquest, but their empire became unstable after the death of the first emperor Qin Shi Huangdi. Within four years, the authority had collapsed in the face of rebellion. Although Xiang Yu proved to be a commander, Liu Bang defeated him at Battle of Gaixia. Liu Bang assumed the title emperor at the urging of his followers and is known posthumously as Emperor Gaozu, Changan was chosen as the new capital of the reunified empire under Han

29.
Watchtower
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A watchtower, or watch tower, is a type of fortification used in many parts of the world. It differs from a tower in that its primary use is military. Its main purpose is to provide a high, safe place from which a sentinel or guard may observe the surrounding area, in some cases, non-military towers, such as religious pagodas, may also be used as watchtowers. The Romans built numerous towers as part of a system of communications, in medieval Europe, many castles and manor houses, or similar fortified buildings, were equipped with watchtowers. In some of the houses of western France, the watchtower equipped with arrow or gun loopholes was one of the principal means of defense. A feudal lord could keep watch over his domain from the top of his tower, in southern Saudi Arabia and Yemen, small stone and mud towers called qasaba were constructed as either watchtowers or keeps in the Asir mountains. Furthermore, in Najd, a watchtower, called Margab, was used to watch for approaching enemies far in distance and shout calling warnings from atop. Scotland saw the construction of Peel towers that combined the function of watchtower with that of a keep or tower house served as the residence for a local notable family. Later many were restored or built against the Barbary pirates, some notable examples of military Mediterranean watchtowers include the towers that the Knights of Malta had constructed on the coasts of Malta. These towers ranged in size from small watchtowers to large structures armed with numerous cannons and they include the Wignacourt, de Redin, and Lascaris towers, named for the Grand Master, such as Martin de Redin, that commissioned each series. In the Channel Islands, the Jersey Round Towers and the Guernsey loophole towers date from the late 18th Century and they were erected to give warning of attacks by the French. One of the last Martello towers to be built was Fort Denison in Sydney harbour, the most recent descendants of the Martello Towers are the flak towers that the various combatants erected in World War II as mounts for anti-aircraft artillery. An example of nonmilitary watchtower in history is the one of Jerusalem, though the Hebrews used it to keep a watch for approaching armies, the religious authorities forbade the taking of weapons up into the tower as this would require bringing weapons through the temple. Rebuilt by King Herod, that watchtower was renamed after Mark Antony, his friend who battled against Gaius Julius Caesar Octavianus, fire lookout tower Observation towers are similar constructions being usually outside of fortifications. A similar use have also Control towers on airports or harbours, diaolou Watchtower Media related to Watch towers at Wikimedia Commons

30.
Rammed earth
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It is an ancient method that has been revived recently as a sustainable building material used in a technique of natural building. Rammed earth is simple to manufacture, non-combustible, thermally massive, strong, edifices formed of rammed earth are on every continent except Antarctica, in a range of environments including temperate, wet, semiarid desert, montane, and tropical regions. The availability of soil and a building design appropriate for local climatic conditions are the factors that favour its use. Historically, additives such as lime or animal blood were used to stabilize it, while modern construction adds lime, cement, to add variety, some modern builders also add coloured oxides or other materials, e. g. bottles, tires, or pieces of timber. The form must be durable and well braced, and the two opposing faces must be clamped together to prevent bulging or deformation caused by the large compressing forces. Damp material is poured into the formwork to a depth of 10 to 25 cm, the material is compressed iteratively, in batches or courses, so as to gradually erect the wall up to the top of the formwork. Tamping was historically manual with a ramming pole, and was very laborious. After a wall is complete, it is strong to immediately remove the formwork. This is necessary if a surface texture is to be applied, e. g. by wire brushing, carving, or mould impression, Construction is optimally done in warm weather so that the walls can dry and harden. The compression strength of the earth increases as it cures, some time is necessary for it to dry. Exposed walls must be sealed to prevent water damage, in modern variations of the technique, rammed-earth walls are constructed on top of conventional footings or a reinforced concrete slab base. Where blocks made of rammed earth are used, they are stacked like regular blocks and are bonded together with a thin mud slurry instead of cement. Special machines, usually powered by engines and often portable, are used to compress the material into blocks. Presently more than 30% of the population uses earth as a building material. Rammed earth has been used globally in a range of climatic conditions. Rammed-earth housing may resolve homelessness caused by otherwise expensive construction techniques, the compressive strength of rammed earth is a maximum of 4.3 MPa. This is less than that of concrete but more than sufficiently strong for domestic edifices, indeed, properly constructed rammed earth endures for thousands of years, as many ancient structures that are still standing around the world demonstrate. See 1960 Agadir earthquake for an example of the destruction which may be inflicted on such structures by an earthquake

31.
Yuezhi
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After a major defeat by the Xiongnu, during the 2nd century BCE, the Yuezhi split into two groups, the Greater Yuezhi and Lesser Yuezhi. Following their defeat, the Greater Yuezhi initially migrated northwest into the Ili Valley and they were driven from the Ili Valley by the Wusun and migrated southward to Sogdia and later settled in Bactria, where they the defeated the Greco-Bactrian Kingdom. The Greater Yuezhi have consequently often been identified with Bactrian peoples mentioned in classical European sources, like the Tókharioi, during the 1st century BCE, one of the five major Greater Yuezhi tribes in Bactria, the Kushanas, began to subsume the other tribes and neighbouring peoples. The subsequent Kushan Empire, at its peak in the 3rd century CE, the Kushanas played an important role in the development of trade on the Silk Road and the introduction of Buddhism to China. Most of the Lesser Yuezhi appear to have migrated southward into Tibet, however, some are reported to have settled among the Qiang people in Qinghai, and to have been involved in the Liangzhou Rebellion. Others are said to have founded the city state of Cumuḍa in the eastern Tarim, a fourth group of Lesser Yuezhi may have become part of the Jie people of Shanxi, who established the 4th Century CE Later Zhao state. The philosophical tract Guanzi is now believed to have been compiled around 26 BCE, based on older texts. In the Guanzi, nomadic pastoralists known as the Yúzhī 禺氏 or Niúzhī 牛氏 and they are described as supplying jade to the Chinese. The export of jade from the Tarim Basin, since at least the late 2nd Millennium BCE, is well-documented archaeologically, for example, hundreds of jade pieces found in the Tomb of Fu Hao originated from the Khotan area, on the southern rim of the Tarim Basin. According to the Guanzi, the Yúzhī/Niúzhī, unlike the neighbouring Xiongnu, in the early 4th Century BCE, the Tale of King Mu, Son of Heaven also mentions the Yúzhī 禺知. The Yi Zhou Shu makes separate references to the Yúzhī 禺氏 and Yuèdī 月氐, trading the jade and horses for Chinese silk, the Wūzhī were then selling these goods to other neighbours. The earliest detailed account of the Yuezhi is found in chapter 123 of the Records of the Great Historian by Sima Qian, essentially the same text appears in chapter 61 of the Book of Han, though Sima Qian has added occasional words and phrases to clarify the meaning. Both texts use the Chinese name Yuezhi, written with the characters yuè moon and shì clan, some scholars have argued that Dunhuang should be Dunhong, a mountain in the Tian Shan, and have placed the original homeland of the Yuezhi 1,000 km further west. The Yuezhi were so powerful that the Xiongnu monarch Touman even sent his eldest son Modu as a hostage to the Yuezhi, the Yuezhi often attacked their neighbour the Wusun to acquire slaves and pasture lands. Wusun originally lived together with the Yuezhi in the region between Dunhuang and Qilian Mountain, the Yuezhi attacked the Wusuns, killed their monarch Nandoumi and took his territory. The son of Nandoumi, Kunmo fled to the Xiongnu and was brought up by the Xiongnu monarch, gradually the Xiongnu grew stronger and war broke out between them and the Yuezhi. There were at least four wars between the Yuezhi and Xiongnu according to the Chinese accounts, the first war broke out during the reign of the Xiongnu monarch Touman who suddenly attacked the Yuezhi. The Yuezhi wanted to kill Modu, the son of the Xiongnu king Touman kept as a hostage to them and he subsequently killed his father and became ruler of the Xiongnu

32.
Records of the Grand Historian
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The work covers the world as it was then known to the Chinese and a 2500-year period from the age of the legendary Yellow Emperor to the reign of Emperor Wu of Han in the authors own time. The Records has been called a text in Chinese civilization. After Confucius and the First Emperor of Qin, Sima Qian was one of the creators of Imperial China, not least because by providing definitive biographies, the Records set the model for the 24 subsequent dynastic histories of China. The work that became Records of the Grand Historian was begun by Sima Tan, after his death in 110 BC, it was continued and completed by his son and successor Sima Qian, who is generally credited as the works author. Sima Qian is known to have completed the Records before his death in c.86 BC, with one copy residing in the capital of Changan. Details regarding the Records early reception and circulation are not well known, beginning in the Northern and Southern dynasties and the Tang dynasty, a number of scholars wrote and edited commentaries to the Records. Most 1st millennium editions of the Records include the commentaries of Pei Yin, Sima Zhen, the primary modern edition of the Records is the Zhonghua Book Company edition of 1959, and is based on an edition prepared by the Chinese historian Gu Jiegang in the early 1930s. There are two known surviving fragments of Records manuscripts from before the Tang dynasty, both of which are preserved in the Ishiyama-dera temple in Ōtsu, Japan, a number of woodblock printed editions of the Records survive, the earliest of which date to the Song dynasty. In all, the Records is about 526,000 Chinese characters long, making it four times longer than Thucydides History of the Peloponnesian War, Sima Qian conceived and composed his work in self-contained units, with a good deal of repetition between them. His manuscript was written on bamboo slips with about 24 to 36 characters each, even after the manuscript was allowed to circulate or be copied, the work would have circulated as bundles of bamboo slips or small groups. Endymion Wilkinson calculates that there were probably between 466 and 700 bundles, whose total weight would have been 88–132 pounds, which would have been difficult to access, later copies on silk would have been much lighter, but also expensive and rare. Until the work was transferred to many centuries later, circulation would have been difficult and piecemeal. Sima Qian organized the chapters of Records of the Grand Historian into five categories, the first five cover either periods, such as the Five Emperors, or individual dynasties, such as the Xia, Shang, and Zhou dynasties. The last seven cover individual rulers, starting with the First Emperor of Qin, Tables Chapters 13 to 22 are the Tables, which are one genealogical table and nine other chronological tables. Each table except the last one begins with an introduction to the period it covers, Hereditary Houses The Hereditary Houses is the second largest of the five Records sections, and comprises chapters 31 to 60. Within this section, the chapters are very different in nature than the later chapters. Many of the chapters are chronicle-like accounts of the leading states of the Zhou dynasty, such as the states of Qin and Lu. The later chapters, which cover the Han dynasty, contain biographies, Ranked Biographies The Ranked Biographies is the largest of the five Records sections, covering chapters 61 to 130, and accounts for 42% of the entire work

33.
Xiongnu
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The Xiongnu, were a confederation of nomadic peoples who, according to ancient Chinese sources, inhabited the eastern Asian Steppe from the 3rd century BC to the late 1st century AD. Chinese sources report that Modu Chanyu, the leader after 209 BC. The Xiongnu were also active in areas now part of Siberia, Inner Mongolia, Gansu and their relations with adjacent Chinese dynasties to the south east were complex, with repeated periods of conflict and intrigue, alternating with exchanges of tribute, trade, and marriage treaties. Attempts to identify the Xiongnu with later groups of the western Eurasian Steppe remain controversial, Scythians and Sarmatians were concurrently to the west. The identity of the core of Xiongnu has been a subject of varied hypotheses, because only a few words, mainly titles. The name Xiongnu may be cognate with that of the Huns and/or the Huna, other linguistic links – all of them also controversial – proposed by scholars include Iranian, Mongolic, Turkic, Uralic Yeniseian, or multi-ethnic. Ancient China often came in contact with the Xianyun and the Xirong nomadic peoples, in later Chinese historiography, some groups of these peoples were believed to be the possible progenitors of the Xiongnu people. These nomadic people often had repeated confrontations with the Shang and especially the Zhou. During the Warring States period, the armies from the Qin, Zhao, qins campaign against the Xiongnu expanded the Qin dynastys territory at the expense of the Xiongnu. In 215 BCE, Qin Shi Huang sent General Meng Tian to conquer the Xiongnu and drive them from the Ordos Loop, after the catastrophic defeat at the hands of General Meng Tian, the Xiongnu leader Touman was forced to flee far into the Mongolian Plateau. The Qin empire became a threat to the Xiongnu, which led to the reorganization of the many tribes into a confederacy. Chubei Huyan Lan Luandi Qiulin Suibu In 209 BCE, three years before the founding of Han China, the Xiongnu were brought together in a confederation under a new chanyu. This new political unity transformed them into a formidable state by enabling formation of larger armies. The Xiongnu adopted many of the Chinese agriculture techniques such as labor for heavy labor, wore silk like the Chinese. The reason for creating the confederation remains unclear, to the north he conquered a number of nomadic peoples, including the Dingling of southern Siberia. He crushed the power of the Donghu people of eastern Mongolia and Manchuria as well as the Yuezhi in the Hexi Corridor of Gansu, Modu also reoccupied all the lands previously taken by the Qin general Meng Tian. Under Modus leadership, the Xiongnu threatened the Han Dynasty, almost causing Emperor Gaozu, the first Han emperor, to lose his throne in 200 BCE. By the time of Modus death in 174 BCE, the Xiongnu had driven the Yuezhi from the Hexi Corridor, killing the Yuezhi king in the process and asserting their presence in the Western Regions

34.
Emperor Wu of Han
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Emperor Wu of Han, born Liu Che, courtesy name Tong, was the seventh emperor of the Han dynasty of China, ruling from 141–87 BC. His reign lasted 54 years — a record not broken until the reign of the Kangxi Emperor more than 1,800 years later. His reign resulted in vast territorial expansion, development of a strong and centralized state resulting from his governmental re-organization and it was also during his reign that cultural contact with western Eurasia was greatly increased, directly or indirectly. Many new crops and other items were introduced to China during his reign, Emperor Wu successfully repelled the nomadic Xiongnu from systematically raiding northern China, and dispatched his envoy Zhang Qian in 139 BC to seek an alliance with the Yuezhi of Kangju. This resulted in further missions to Central Asia, michael Loewe called the reign of Emperor Wu the high point of Modernist policies, looking back to adapt ideas from the pre-Han period. His policies and most trusted advisers were Legalist, favoring adherents of Shang Yang and these reforms had an enduring effect throughout the existence of imperial China and an enormous influence on neighboring civilizations. Emperor Wu was also known for his employment of shaman advisers, the personal name of Emperor Wu was Liu Che. The use of Han in referring to emperor Wu is a reference to the Han dynasty of which he was a part. His family name is Liu, the family or clan of the Han dynasty shared the family name of Liu, the family name of Liu Bang. The character Di is a title, this is the Chinese word which in imperial history of China means emperor, the character Wu literally means martial or warlike, but is also related to the concept of a particular divinity in the historical Chinese religious pantheon existing at that time. Combined, Wu plus di makes the name Wudi, the posthumous name used for historical and for religious purposes. One of Han Wudis innovations was the practice of changing names every so many years. Thus, the practice for dating years during the reign of Wudi came to be the nth year of the, when they got close to Han borders, She assassinated the general and claimed to Emperor Wu that he had defeated Joseon in battle. Emperor Wu, unaware of his deception, made him the commander of the Commandery of Liaodong. King Ugeo, offended, made a raid on Liaodong and killed She, in response, Emperor Wu commissioned a two-pronged attack against Joseon. Initially, Joseon offered to become a vassal, but peace negotiations broke down by the Chinese forces refusal to let a Joseon force escort its crown prince to Changan to pay tribute to Emperor Wu, Han took over the Joseon lands in 108 BC and established four commanderies. Also in 109 BC, Emperor Wu sent a force against the Kingdom of Dian. When the King of Dian surrendered, it was incorporated into Han territory with the King of Dian being permitted to keep his traditional authority, Emperor Wu established five commanderies over Dian and the other nearby kingdoms

35.
Garrison
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Garrison is the collective term for a body of troops stationed in a particular location, originally to guard it, but now often simply using it as a home base. The garrison is usually in a city, town, fort, castle, garrison town is a common expression for any town that has a military base nearby. Garrison towns were used during the Arab Islamic conquests of Middle Eastern lands by Arab-Muslim armies to increase their dominance over indigenous populations. In Ireland, Association football has historically been termed the game or the garrison sport for its connections with British military serving in Irish cities. In Israel, a unit is a regular unit defending a specified Israeli zone in need of protection from attack from combatants. Israeli garrison units placed in the territories of West Bank are recognized under UN Resolution 242 as occupied pending peaceful recognition by all regional combatants. It was an old custom in ancient Italy to send out colonies for the purpose of securing new conquests, the Romans, having no standing army, used to plant bodies of their own citizens in conquered towns as a kind of garrison

36.
Zhangye
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Zhangye, formerly romanized as Changyeh or known as Kanchow, is a prefecture-level city in central Gansu Province in the Peoples Republic of China. It borders Inner Mongolia on the north and Qinghai on the south and its central district is Ganzhou, formerly a city of the Western Xia and one of the most important outposts of western China. The city was known as Ganzhou, named after the sweet waters of its oasis. The name is retained by both Zhangyes central district and province, the name appears in Marco Polos Travels under the name Campichu. Zhangye was used as the name of the commandery and then for the city itself. The name Zhangye is excerpted from the phrase To extend the arm of the country through to the Western Realm, Zhangye lies in the center of the Hexi Corridor. The area is on the frontier of China Proper, protecting it from the nomads of the northwest, during the Han Dynasty, Chinese armies were often engaged against the Xiongnu in this area. It was also an important outpost on the Silk Road, before being overrun by the Mongols, it was dominated by the Western Xia, and before by the Uyghurs from at least the early 10th century. Its relation to the larger Uyghur state of Qocho is obscure, the Mongol Emperor Kublai Khan is said to have been born in the Dafo Temple, Zhangye, now the site of the longest wooden reclining Buddha in China. Marco Polos journal states that he spent a year in the town during his journey to China, the pine forests of the Babao Mountains formerly regulated the flow of the Ruo or Hei Shui, Ganzhous primary river. By ensuring that the meltwaters lasted throughout the summer, they avoided both early flood and later drought for the valleys farmers. Despite reports that they should thus be protected in perpetuity, an official in charge of erecting the poles for Chinas telegraph network ordered them cleared in the 1880s. Almost immediately, the region prone to flooding in the summer and draught in the autumn. Christian missionaries arrived in 1879, after Suzhou was found to be too hostile for their settlement, Zhangye has 1 urban district,4 counties,1 autonomous county,97 towns, and 978 villages. Zhangye is located in central Gansu along the Hexi Corridor, occupying 42,000 km2. It takes up the entire breadth of the province, running from Inner Mongolia on the north to Qinghai on the south and its streams, sunlight, and fertile soil make it an important regional agricultural center, although it was seriously damaged by overforesting in the 19th century. The Zhangye Danxia National Geological Park, covering an area of 510 square kilometers, is located in Linze, known for its colorful rock formations, it has been voted by Chinese media outlets as one of the most beautiful landforms in China. Zhangye has a desert climate with very warm summers and cold

37.
Wuwei, Gansu
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Wuwei is a prefecture-level city in northwest central Gansu province. In the north it borders Inner Mongolia, in the southwest and its central location between three western capitals, Lanzhou, Xining, and Yinchuan makes it an important business and transportation hub for the area. In ancient times, Wuwei was called Liangzhou and is the terminus of the Hexi Corridor. People began settling here 5,000 years ago and it was a key link for the Northern Silk Road, and a number of important archaeological finds were uncovered from Wuwei, including ancient copper carts with stone animals. Other graves found along the Hexi Corridor show Xiongnu and other minority influence and they attacked the town of Zhenzhong but, having stayed for more than forty days without being able to subdue it, they withdrew. Following this, the kings of Shule killed one another repeatedly and, for its part, in 121 BC Han emperor Wudi brought his cavalry here to defend the Hexi Corridor against the Xiongnu Huns. His military success allowed him to expand the corridor westward and its importance as a stop along the Silk Road made it a crossroads of cultures and ethnic groups from all over central Asia. Numerous Buddhist grottoes and temples in the area attest to its role as a path for bringing Buddhism from India, during the Three Kingdoms period, Liangzhou was governed by Qiang leader Ma Teng. After the death of Ma Teng, Ma Chao assumed the post and governed the province for a time before it fell into the hands of Cao Cao. Famous cultural relics from Wuwei include the Galloping Bronze Horse, Western Xia stele, White Tower Temple, Tianti Mountain Grotto, Luoshi Temple Tower, wuweis geography is dominated by three plateaus, the Loess, Tibetan, and Mongolian. Elevation can be generalized as, the south is high and the north is low, average annual temperature is 7.8 °C. The climate is arid with rainfall between 60 to 610 mm. Evaporation is from 1,400 to 3,000 mm, there are 2200–3000 sunlight hours each year and from 85–165 frost free days. Temperatures during summer in excess of 45.0 °C in the shade are by no means unheard of, southwest of Wuwei, there is a 230 metres thick Tianzhu Formation made of clastics intercalated with sandy shale and shale. Minerals deposits occurring in the vicinity of Wuwei include graphite, iron, titanium, a species of stone loach, Triplophysa wuweiensis, is named after Wuwei where it was first discovered. 1 urban district,2 counties,1 autonomous county,116 towns, urban,509,600 with 38 ethnic groups represented including Han, Hui, Mongol, Tu, Tibetan, etc. Consistent sunlight and fertile soil make agriculture one of Wuwei’s biggest industries, other important industries are textiles, metallurgy, and construction materials. Melons, vegetables, wine and livestock are all major agricultural products, organic farming is a trend with more land being set aside for “green farming” each year

38.
Northern Silk Road
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It is the northern-most branch of several Silk Roads providing trade, military movements and cultural exchange between China and the west. The route started at Changan, the capital of the Han Dynasty, the route was defined about the 1st Century BCE as Han Wudi put an end to harassment by nomadic tribes. One of the branch routes turned northwest to the north of the Aral and Caspian seas, hexi Corridor Kashgar Dunhuang Pictures from the Northern Silk Road

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White Horse Pagoda, Dunhuang
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The pagoda is located about 2 km southwest of the centre of Dunhuang city. It was repaired in the Daoguang era and again in 1992 and it is 12 metres high and 7 metres in diameter and consists of 9 levels in total. The exterior is built of bricks and is filled with grass. Above that are three metal balls surmounted by a trident, local people say the chime of the bells are an echo of the neighing of the horse. Kumārajīva, a monk and translator, was born in the oasis city-state of Kucha, the son of a Kuchean princess. The horse found passages through high mountains, across raging rivers, according to legend, when Kumārajīva reached the ancient city of Shazhou he stopped for several days at Puguang Temple to preach the scriptures. Just before he was due to leave, Tianliu became sick and he was devastated by the death of his faithful companion and built this unique nine-storied pagoda containing relics of the Buddha, Kumārajīva was very sad. He erected an altar for the white horse and performed Buddhist rites at it for nine days. In the courtyard of Puguang Temple he built the White Horse Pagoda, the Diamond Sutra, one of the scriptures Kumārajīva brought to China, was first translated into Chinese by him in 402. It became the most widely-read, recited and copied version of the sutra in China, in spite of the fact that translations were made by several others. A printed copy of this sutra, found at the Mogao Caves near Dunhuang in 1910, is dated in the year 868 CE and it has recently been restored at the British Library, an exacting process that took seven years. Horse in Chinese mythology Du and Wang, Dunhuang & Silk Road, compiled by, Du Doucheng and Wang Shuqing. Sea Sky Publishing House, Shenzen, China, p.52, van Schaik, The Diamond Sutra, History and Transmission. Wood and Barnard, The Diamond Sutra, The Story of the Worlds Earliest Printed Book, wood and Barnard, Restoration of the Diamond Sutra

40.
Sui Dynasty
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The Sui Dynasty was a short-lived imperial dynasty of China of pivotal significance. It was succeeded by the Tang dynasty, which inherited its foundation. Founded by Emperor Wen of Sui, the Sui dynasty capital was Changan and they also spread and encouraged Buddhism throughout the empire. By the middle of the dynasty, the unified empire entered a golden age of prosperity with vast agricultural surplus that supported rapid population growth. A lasting legacy of the Sui dynasty was the Grand Canal, the dynasty, which lasted only thirty-seven years, was undermined by ambitious wars and construction projects, which overstretched its resources. Particularly, under Emperor Yang, heavy taxation and compulsory labor duties would eventually induce widespread revolts, the dynasty is often compared to the earlier Qin dynasty for unifying China after prolonged division. Wide-ranging reforms and construction projects were undertaken to consolidate the newly unified state, after crushing an army in the eastern provinces, Yang Jian usurped the throne to become Emperor Wen of Sui. In a bloody purge, he had fifty-nine princes of the Zhou royal family eliminated, Emperor Wen abolished the anti-Han policies of Zhou and reclaimed his Han surname of Yang. In his campaign for southern conquest, Emperor Wen assembled thousands of boats to confront the forces of the Chen dynasty on the Yangtze River. The largest of ships were very tall, having five layered decks. They were outfitted with six 50-foot-long booms that were used to swing and damage enemy ships, besides employing Xianbei and other Chinese ethnic groups for the fight against Chen, Emperor Wen also employed the service of people from southeastern Sichuan, which Sui had recently conquered. In 588, the Sui had amassed 518,000 troops along the bank of the Yangtze River. The Chen dynasty could not withstand such an assault, by 589, Sui troops entered Jiankang and the last emperor of Chen surrendered. Although Emperor Wen was famous for bankrupting the treasury with warfare and construction projects. He established granaries as sources of food and as a means to market prices from the taxation of crops. The large agricultural surplus supported rapid growth of population to historical peak, the state capital of Changan, while situated in a military-secured heartland of Guanzhong, was remote from the economic centers to the east and south of the empire. Emperor Wen initiated the construction of the Grand Canal, with completion of the first route that directly linked Changan to the Yellow River, Later Emperor Yang would enormously enlarge the scale of the Grand Canal construction. Externally, the emerging nomadic Turkic Khaganate in the north posed a threat to the newly founded dynasty

County-level city
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A county-level municipality, county-level city, or county city is a county-level administrative division of mainland China. County-level cities are governed by prefecture-level divisions, but a few are governed directly by province-level divisions. Most county-level cities were created in the 1980s and 1990s by replacing counties, a county-level ci

1.
In the main urban area of Daye, a county-level city within the prefecture-level city of Huangshi, Hubei. Daye also includes some separate towns, such as Dajipu (大箕铺)

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County-level city

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Old City Chinese quarter

Geographic coordinate system
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A geographic coordinate system is a coordinate system used in geography that enables every location on Earth to be specified by a set of numbers, letters or symbols. The coordinates are chosen such that one of the numbers represents a vertical position. A common choice of coordinates is latitude, longitude and elevation, to specify a location on a

1.
Longitude lines are perpendicular and latitude lines are parallel to the equator.

China
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China, officially the Peoples Republic of China, is a unitary sovereign state in East Asia and the worlds most populous country, with a population of over 1.381 billion. The state is governed by the Communist Party of China and its capital is Beijing, the countrys major urban areas include Shanghai, Guangzhou, Beijing, Chongqing, Shenzhen, Tianjin

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Yinxu, ruins of an ancient palace dating from the Shang Dynasty (14th century BCE)

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Flag

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Some of the thousands of life-size Terracotta Warriors of the Qin Dynasty, c. 210 BCE

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The Great Wall of China was built by several dynasties over two thousand years to protect the sedentary agricultural regions of the Chinese interior from incursions by nomadic pastoralists of the northern steppes.

Province (China)
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Provinces, formally provincial-level administrative divisions or first-level administrative divisions, are the highest-level Chinese administrative divisions. There are 34 such divisions, classified as 23 provinces, four municipalities, five autonomous regions, the Peoples Republic of China claims sovereignty over the territory administered by the

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Map comparing administrative divisions as drawn by the PRC and ROC.

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Provincial division 省份 Shěngfèn

Gansu
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Gansu is a province of the Peoples Republic of China, located in the northwest of the country. It lies between the Tibetan and Loess plateaus, and borders Mongolia, Inner Mongolia, and Ningxia to the north, Xinjiang and Qinghai to the west, Sichuan to the south, the Yellow River passes through the southern part of the province. Gansu has a populati

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Jiayuguan Fort

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Map showing the location of Gansu Province

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The ruins of a Han dynasty (202 BC – 220 AD) Chinese watchtower made of rammed earth at Dunhuang, Gansu province, the eastern edge of the Silk Road

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Semi-arid land, suitable for light grazing

Prefecture-level city
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Prefectural level cities form the second level of the administrative structure. Administrative chiefs of prefectural level cities generally have the rank as a division chief of a national ministry. Since the 1980s, most former prefectures have been renamed into prefectural level cities, a prefectural level city is a city and prefecture that have be

1.
A road sign shows distance to the "Huangshi urban area" (黄石市区) rather than simply " Huangshi " (黄石). This is a useful distinction, because the sign is located already within Huangshi prefectural level city (immediately upon entering its Yangxin County from the neighboring Xianning), but still 100 kilometres (62 mi) from the Huangshi main urban area.

2.
Prefecture-level city Prefectural-level city

Jiuquan
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Jiuquan, formerly known as Suzhou, is a prefecture-level city in the northwesternmost part of Gansu Province in the Peoples Republic of China. It is more than 600 km wide from east to west, occupying 191,342 km2 and its population was 962,000 in 2002. The city was known as Fulu, which became known as Suzhou after it became the seat of Su Prefecture

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Jiuquan Park

China standard time
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The time in China follows a single standard time offset of UTC+08,00, despite China spanning five geographical time zones. The official national standard time is called Beijing Time domestically and China Standard Time internationally, daylight saving time has not been observed since 1991. The special administrative regions maintain their own autho

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Obsoleted time zones used from 1918 to 1949

Chinese language
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Chinese is a group of related, but in many cases mutually unintelligible, language varieties, forming a branch of the Sino-Tibetan language family. Chinese is spoken by the Han majority and many ethnic groups in China. Nearly 1.2 billion people speak some form of Chinese as their first language, the varieties of Chinese are usually described by nat

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The Tripitaka Koreana, a Korean collection of the Chinese Buddhist canon

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" Preface to the Poems Composed at the Orchid Pavilion " by Wang Xizhi, written in semi-cursive style

Standard Chinese
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Its pronunciation is based on the Beijing dialect, its vocabulary on the Mandarin dialects, and its grammar is based on written vernacular Chinese. Like other varieties of Chinese, Standard Chinese is a language with topic-prominent organization. It has more initial consonants but fewer vowels, final consonants, Standard Chinese is an analytic lang

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A poster outside of high school in Yangzhou urges people to speak Putonghua

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Zhongguo Guanhua (中国官话/中國官話), or Medii Regni Communis Loquela ("Middle Kingdom's Common Speech"), used on the frontispiece of an early Chinese grammar published by Étienne Fourmont (with Arcadio Huang) in 1742

Hanyu Pinyin
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Pinyin, or Hànyǔ Pīnyīn, is the official romanization system for Standard Chinese in mainland China, Malaysia, Singapore, and Taiwan. It is often used to teach Standard Chinese, which is written using Chinese characters. The system includes four diacritics denoting tones, Pinyin without tone marks is used to spell Chinese names and words in languag

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A school slogan asking elementary students to speak Putonghua is annotated with pinyin, but without tonal marks.

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In Yiling, Yichang, Hubei, text on road signs appears both in Chinese characters and in Hanyu Pinyin

Cantonese
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Cantonese, or Standard Cantonese, is a variety of Chinese spoken in the city of Guangzhou in southeastern China. It is the prestige variety of Yue, one of the major subdivisions of Chinese. In mainland China, it is the lingua franca of the province of Guangdong and some neighbouring areas such as Guangxi. In Hong Kong and Macau, Cantonese serves as

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Street in Chinatown, San Francisco. Cantonese has traditionally been the dominant Chinese variant among Chinese populations in the Western world.

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Chinese dictionary from Tang dynasty. Modern Cantonese pronunciation is more similar to Middle Chinese from this era than other Chinese varieties.

Jyutping
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Jyutping is a romanisation system for Cantonese developed by the Linguistic Society of Hong Kong, an academic group, in 1993. Its formal name is The Linguistic Society of Hong Kong Cantonese Romanisation Scheme, the LSHK promotes the use of this romanisation system. The name Jyutping is a contraction consisting of the first Chinese characters of th

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Jyutping Romanization.

County (PRC)
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There are 1,464 counties in Mainland China out of a total of 2,862 county-level divisions. Xian have existed since the Warring States period, and were established nationwide during the Qin Dynasty, the term xian is usually translated as districts or prefectures when put in the context of Chinese history. This article, however, will try to keep the

Silk Road
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While the term is of modern coinage, the Silk Road derives its name from the lucrative trade in silk carried out along its length, beginning during the Han dynasty. The Han dynasty expanded Central Asian sections of the routes around 114 BCE, largely through missions and explorations of the Chinese imperial envoy. The Chinese took great interest in

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Chinese jade and steatite plaques, in the Scythian -style animal art of the steppes. 4th–3rd century BCE. British Museum.

Mogao Caves
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The caves contain some of the finest examples of Buddhist art spanning a period of 1,000 years. The first caves were dug out in 366 AD as places of Buddhist meditation, the Mogao Caves are the best known of the Chinese Buddhist grottoes and, along with Longmen Grottoes and Yungang Grottoes, are one of the three famous ancient Buddhist sculptural si

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UNESCO World Heritage Site

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Details of painting of the meeting of Manjusri and Vimalakirti. Cave 159.

Uyghur language
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Significant communities of Uyghur-speakers are located in Kazakhstan and Uzbekistan, and various other countries have Uyghur-speaking expatriate communities. Uyghur belongs to the Karluk branch of the Turkic language family, like many other Turkic languages, Uyghur displays vowel harmony and agglutination, lacks noun classes or grammatical gender,

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A signboard in front of the Military Museum of Xinjiang written in Uyghur (using Arabic script) and Standard Chinese

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Geographical extent of Uyghur in China

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A sign in Ghulja, Xinjiang, written in Uyghur (using Arabic script) and Chinese (both Hanzi and Pinyin)

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Internet café in Khotan oasis city in the Xinjiang Uyghur Autonomous Region of the People's Republic of China. Address written in Uyghur Language/ Arabic script

Oasis
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In geography, an oasis is an isolated area of vegetation in a desert, typically surrounding a spring or similar water source, such as a pond or small lake. Oases also provide habitat for animals and even if the area is big enough. The location of oases has been of importance for trade and transportation routes in desert areas, caravans must travel

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Oasis in the Libyan part of the Sahara Desert

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Taghit, Algeria

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Ein Gedi, Israel

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Fish Springs National Wildlife Refuge, Utah.

Crescent Lake (Dunhuang)
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Yueyaquan is a crescent-shaped lake in an oasis,6 km south of the city of Dunhuang in Gansu Province, China. It was named Yueyaquan in the Qing Dynasty, according to measurements made in 1960, the average depth of the lake was 4 to 5 meters, with a maximum depth of 7.5 metres. In the following 40 years, the depth of the lake continually declined, i

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Crescent Lake in 2009

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The lake and pavilion in June 2006. What is left of the lake is on the far right.

Singing sand
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Singing sand, also called whistling sand or barking sand, is sand that produces sound. The sound emission may be caused by passing over dunes or by walking on the sand. Certain conditions have to come together to create singing sand, The sand grains have to be round, the sand has to contain silica. The sand needs to be at a certain humidity, the mo

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Sand blowing off a crest in the Kelso Dunes of the Mojave Desert, California

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Sand dunes on the edge of Dunhuang

Silk Route
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While the term is of modern coinage, the Silk Road derives its name from the lucrative trade in silk carried out along its length, beginning during the Han dynasty. The Han dynasty expanded Central Asian sections of the routes around 114 BCE, largely through missions and explorations of the Chinese imperial envoy. The Chinese took great interest in

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Chinese jade and steatite plaques, in the Scythian -style animal art of the steppes. 4th–3rd century BCE. British Museum.

Lhasa
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Lhasa is a city and administrative capital of the Tibet Autonomous Region of the Peoples Republic of China. Lhasa is the second most populous city on the Tibetan Plateau after Xining and, at an altitude of 3,490 metres, the city has been the religious and administrative capital of Tibet since the mid-17th century. It contains many culturally signif

Mongolia
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Mongolia /mɒŋˈɡoʊliə/ is a landlocked unitary sovereign state in East Asia. Its area is equivalent with the historical territory of Outer Mongolia. It is sandwiched between China to the south and Russia to the north, while it does not share a border with Kazakhstan, Mongolia is separated from it by only 36.76 kilometers. At 1,564,116 square kilomet

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Deer stones in Mongolia

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Flag

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Pasture land in Arkhangai Province. Mongolia was the heartland of many nomadic empires.

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Mongolian ordos (palaces) were likened to "cities on the move" (Plano Carpini).

Siberia
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Siberia is an extensive geographical region, and by the broadest definition is also known as North Asia. Siberia has historically been a part of Russia since the 17th century, the territory of Siberia extends eastwards from the Ural Mountains to the watershed between the Pacific and Arctic drainage basins. It stretches southwards from the Arctic Oc

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Painting of Chukchi by Louis Choris, 1816

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Siberian Federal District Geographic Russian Siberia Siberia in its widest definition and historical use

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The tower of a 17th-century ostrog fort in Yakutsk

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Siberian Cossack family in Novosibirsk

Hexi Corridor
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Hexi Corridor or Gansu Corridor refers to the historical route in Gansu province of China. The corridor is a string of oases along the edge of the Tibetan Plateau. To the south is the high and desolate Tibetan Plateau and to the north, the Gobi Desert, at the west end the route splits in three, going either north of the Tian Shan or south on either

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The central and western parts of the modern province of Gansu correspond to the Gansu Corridor

Chang'an
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Changan is an ancient capital of more than ten dynasties in Chinese history, today known as Xian. Changan means Perpetual Peace in Classical Chinese, during the short-lived Xin dynasty, the city was renamed Constant Peace, yet after its fall in AD23, the old name was restored. By the time of the Ming dynasty, the name was changed to Xian, meaning W

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Que towers along the walls of Tang -era Chang'an, as depicted in this 8th-century mural from Li Chongrun 's (682–701) tomb at the Qianling Mausoleum in Shaanxi

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A terracotta horse head from the Han dynasty.

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The Giant Wild Goose Pagoda, built in 652 AD, located in the southeast sector of Chang'an.

Luoyang
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Luoyang, formerly romanized as Loyang, is a city located in the confluence area of Luo River and Yellow River in Central China. It is a city in western Henan province. It borders the capital of Zhengzhou to the east, Pingdingshan to the southeast, Nanyang to the south, Sanmenxia to the west, Jiyuan to the north. Situated on the plain of China, Luoy

Han Dynasty
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The Han dynasty was the second imperial dynasty of China, preceded by the Qin dynasty and succeeded by the Three Kingdoms period. Spanning over four centuries, the Han period is considered an age in Chinese history. To this day, Chinas majority ethnic group refers to itself as the Han people and it was founded by the rebel leader Liu Bang, known po

1.
History of China

2.
Han dynasty in 1 AD.

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A silk banner from Mawangdui, Changsha, Hunan province. It was draped over the coffin of Lady Dai (d. 168 BC), wife of the Marquess Li Cang (利蒼) (d. 186 BC), chancellor for the Kingdom of Changsha.

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A gilded bronze oil lamp in the shape of a kneeling female servant, dated 2nd century BC, found in the tomb of Dou Wan, wife of the Han prince Liu Sheng; its sliding shutter allows for adjustments in the direction and brightness in light while it also traps smoke within the body.

Watchtower
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A watchtower, or watch tower, is a type of fortification used in many parts of the world. It differs from a tower in that its primary use is military. Its main purpose is to provide a high, safe place from which a sentinel or guard may observe the surrounding area, in some cases, non-military towers, such as religious pagodas, may also be used as w

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Watchtower of the camp of the French artillery detachment of the IFOR, Sarajevo, 1995.

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Panglao watchtower in Bohol, Philippines

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Tower of Hercules, Spain

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Roman Watchtower in Germany.

Rammed earth
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It is an ancient method that has been revived recently as a sustainable building material used in a technique of natural building. Rammed earth is simple to manufacture, non-combustible, thermally massive, strong, edifices formed of rammed earth are on every continent except Antarctica, in a range of environments including temperate, wet, semiarid

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The ruins of a Han Dynasty (202 BCE – 220 CE) Chinese watchtower made of rammed earth at Dunhuang, Gansu province, at the eastern end of the Silk Road

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A typical Hmong house-building technique in the subtropical climate of Vietnam

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Model showing construction of rammed-earth wall on foundation

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Taipa fortifications at Paderne Castle in the Algarve, Portugal

Yuezhi
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After a major defeat by the Xiongnu, during the 2nd century BCE, the Yuezhi split into two groups, the Greater Yuezhi and Lesser Yuezhi. Following their defeat, the Greater Yuezhi initially migrated northwest into the Ili Valley and they were driven from the Ili Valley by the Wusun and migrated southward to Sogdia and later settled in Bactria, wher

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The migrations of the Yuezhi through Central Asia, from around 176 BCE to 30 CE

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The Yuezhi were settled to the northwest of Qin China in the 3rd century BCE.

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A Scythian horseman from the area invaded by the Yuezhi, Pazyryk, c.300 BCE.

Records of the Grand Historian
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The work covers the world as it was then known to the Chinese and a 2500-year period from the age of the legendary Yellow Emperor to the reign of Emperor Wu of Han in the authors own time. The Records has been called a text in Chinese civilization. After Confucius and the First Emperor of Qin, Sima Qian was one of the creators of Imperial China, no

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Early printed edition

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Sima Qian

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Chapter 2, Annals of Xia (Ming dynasty edition)

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History

Xiongnu
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The Xiongnu, were a confederation of nomadic peoples who, according to ancient Chinese sources, inhabited the eastern Asian Steppe from the 3rd century BC to the late 1st century AD. Chinese sources report that Modu Chanyu, the leader after 209 BC. The Xiongnu were also active in areas now part of Siberia, Inner Mongolia, Gansu and their relations

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Xiongnu

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Asia in 200 BCE, showing the early Xiongnu state and its neighbors.

Emperor Wu of Han
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Emperor Wu of Han, born Liu Che, courtesy name Tong, was the seventh emperor of the Han dynasty of China, ruling from 141–87 BC. His reign lasted 54 years — a record not broken until the reign of the Kangxi Emperor more than 1,800 years later. His reign resulted in vast territorial expansion, development of a strong and centralized state resulting

Garrison
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Garrison is the collective term for a body of troops stationed in a particular location, originally to guard it, but now often simply using it as a home base. The garrison is usually in a city, town, fort, castle, garrison town is a common expression for any town that has a military base nearby. Garrison towns were used during the Arab Islamic conq

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"Arrival of the dean fleet ", showing the garrison of Malta in 1565 and the Ottoman invasion force.

Zhangye
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Zhangye, formerly romanized as Changyeh or known as Kanchow, is a prefecture-level city in central Gansu Province in the Peoples Republic of China. It borders Inner Mongolia on the north and Qinghai on the south and its central district is Ganzhou, formerly a city of the Western Xia and one of the most important outposts of western China. The city

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Near Aviko french fry factory in Liuba Town, Minle County, Zhangye

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The Dafo Temple contains the largest reclining wooden Buddha in China, and is the reputed birthplace of Kublai Khan.

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Parc Ferme at Zhangye International Rally 2011 in front of the Wooden Pagoda

Wuwei, Gansu
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Wuwei is a prefecture-level city in northwest central Gansu province. In the north it borders Inner Mongolia, in the southwest and its central location between three western capitals, Lanzhou, Xining, and Yinchuan makes it an important business and transportation hub for the area. In ancient times, Wuwei was called Liangzhou and is the terminus of

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The square at the Wuwei railway station

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Wen Miao Confucian temple.

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Bell tower.

Northern Silk Road
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It is the northern-most branch of several Silk Roads providing trade, military movements and cultural exchange between China and the west. The route started at Changan, the capital of the Han Dynasty, the route was defined about the 1st Century BCE as Han Wudi put an end to harassment by nomadic tribes. One of the branch routes turned northwest to

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Taklamakan Desert

White Horse Pagoda, Dunhuang
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The pagoda is located about 2 km southwest of the centre of Dunhuang city. It was repaired in the Daoguang era and again in 1992 and it is 12 metres high and 7 metres in diameter and consists of 9 levels in total. The exterior is built of bricks and is filled with grass. Above that are three metal balls surmounted by a trident, local people say the

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White Horse Pagoda

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Showing construction of pagoda

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Wall painting and incense brazier at pagoda

Sui Dynasty
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The Sui Dynasty was a short-lived imperial dynasty of China of pivotal significance. It was succeeded by the Tang dynasty, which inherited its foundation. Founded by Emperor Wen of Sui, the Sui dynasty capital was Changan and they also spread and encouraged Buddhism throughout the empire. By the middle of the dynasty, the unified empire entered a g

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Map of Tarim Basin in the 3rd century C.E. Khotan kingdom shown in green in the southern region.

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Coin of Gurgamoya, king of Khotan. Khotan, 1st century CE. Obv: Kharosthi legend, "Of the great king of kings, king of Khotan, Gurgamoya. Rev: Chinese legend: "Twenty-four grain copper coin". British Museum

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Daughter of the King of Khotan married to the ruler of Dunhuang, Cao Yanlu, shown here wearing elaborate headdress decorated with jade pieces. Mural in Mogao Cave 61, Five Dynasties.

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Strandkorb chairs on Usedom Island, Germany. Not only the service sector grows thanks to tourism, but also local manufacturers (like those producing the strandkorb), retailers, the real estate sector and the general image of a location can benefit a lot.

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Celestial figures above serial Buddhas in the Thousand Buddha tradition, west wall, Cave 7 (Northern Wei); the ritual practice of foming (佛名), or naming the Buddhas, may lie behind such representations (names appear on the white labels beside each figure in the lower two tiers)

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A map of the Western Han Dynasty in 2 AD: 1) the territory shaded in dark blue represents the principalities and centrally-administered commanderies of the Han Empire; 2) the light blue area shows the extent of the Tarim Basin protectorate of the Western Regions.

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A silk banner from Mawangdui, Changsha, Hunan province. It was draped over the coffin of Lady Dai (d. 168 BC), wife of the Marquess Li Cang (利蒼) (d. 186 BC), chancellor for the Kingdom of Changsha.

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Shilin's Night Market; now indoors. This is the food-court area. Some vendors do not fit in the indoor section and still have stalls outdoors (see photo below). Some vendors move outdoors in nice weather in Spring and Fall, to attract more customers.